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DESCRIPTION JPWO2017038017
Abstract Provided is a speaker device capable of improving sound quality. The speaker device
includes a plurality of speaker units, and a plurality of horns provided in each of the plurality of
speaker units and limiting the spread of the sound output from the speaker unit to a
predetermined range.
Speaker device
[0001]
The present disclosure relates to a speaker device.
[0002]
Patent Document 1 discloses a bass reflex type speaker device.
The speaker device disclosed in Patent Document 1 includes an enclosure, a speaker unit, and a
duct. The speaker unit is disposed inside the enclosure and attached to the enclosure. The duct is
disposed inside the enclosure to ventilate the inside of the enclosure and the outside of the
enclosure. In this speaker device, air in the duct resonates when the speaker unit vibrates at a
predetermined low frequency. As a result, in this speaker device, the low frequency range audio
output is enhanced.
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[0003]
JP, 2014-049999, A
[0004]
The present disclosure provides a speaker device that can improve the sound quality.
[0005]
The speaker device in the present disclosure includes a plurality of speaker units, and a plurality
of horns provided for each of the plurality of speaker units and limiting the spread of the sound
output from the speaker unit to a predetermined range.
[0006]
The speaker device in the present disclosure can improve the sound quality.
[0007]
FIG. 1 is a view schematically showing a configuration example of an audio system provided with
the speaker device according to the first embodiment.
FIG. 2 is a perspective view schematically showing one configuration example of the speaker
device in the first embodiment.
FIG. 3 is a perspective view schematically showing one configuration example of the speaker
device in the first embodiment.
FIG. 4 is a perspective view schematically showing one configuration example of the speaker
device in the first embodiment.
FIG. 5 is a perspective view schematically showing an example of the internal structure of the
speaker device according to the first embodiment. FIG. 6 is a perspective view schematically
showing an example of the internal structure of the speaker device according to the first
embodiment. FIG. 7 is a perspective view schematically showing an example of the internal
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structure of the speaker device according to the first embodiment. FIG. 8 is a side view
schematically showing an example of the internal structure of the speaker device according to
the first embodiment. FIG. 9 is a perspective view schematically showing one configuration
example of the acoustic tube of the speaker device in the first embodiment. FIG. 10 is a side view
schematically showing a configuration example of a pedestal portion and a periphery thereof
provided in the speaker device according to the first embodiment. FIG. 11 is a perspective view
schematically showing one configuration example of the tweeter portion provided in the speaker
device in the first embodiment. FIG. 12 is a top view schematically showing one configuration
example of the tweeter portion provided in the speaker device in the first embodiment. FIG. 13 is
a diagram schematically showing an example of the relationship between the sound pressure and
the frequency of the woofer unit provided in the speaker device according to the first
embodiment. FIG. 14 is a view schematically showing an example of the relationship between the
amplitude and the frequency of the diaphragm of the woofer speaker unit provided in the
speaker device according to the first embodiment. FIG. 15 is a diagram schematically showing an
example of the relationship between the impedance and the frequency of the woofer speaker unit
provided in the speaker device according to the first embodiment. FIG. 16 is a block diagram
showing a configuration example of components related to boost control of the woofer speaker
unit provided in the speaker device according to the first embodiment.
[0008]
Hereinafter, embodiments will be described in detail with reference to the drawings as
appropriate. However, more detailed description than necessary may be omitted. For example,
detailed descriptions of well-known matters and redundant descriptions of substantially the same
configurations may be omitted. This is to avoid unnecessary redundancy in the following
description and to facilitate understanding by those skilled in the art.
[0009]
It should be noted that the attached drawings and the following description are provided to
enable those skilled in the art to fully understand the present disclosure, and they are not
intended to limit the claimed subject matter.
[0010]
Further, each drawing is a schematic view, and is not necessarily illustrated exactly.
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In each of the drawings, substantially the same components may be denoted by the same
reference numerals and descriptions thereof may be omitted or simplified.
[0011]
First Embodiment A speaker device according to a first embodiment and an acoustic system
including the speaker device will be described below with reference to FIGS. 1 to 15.
[0012]
［１−１．
Overall Configuration of Sound System] FIG. 1 is a view schematically showing one configuration
example of a sound system 100 provided with the speaker device 1 according to the first
embodiment. FIG. 1 shows a perspective view of the acoustic system 100 as viewed from the
front side. In the present embodiment, the side where the operation unit 110 of the music player
101 is provided is taken as the front.
[0013]
The sound system 100 includes one music player 101 and two speaker devices 1. In addition, the
number of the music player 101 and the speaker apparatus 1 is not limited to the said numerical
value. The sound system 100 may have two or more music players 101. Also, the sound system
100 may include one or three or more speaker devices.
[0014]
The speaker device 1 is connected to the music player 101, and converts an audio signal (audio
signal) output from the music player 101 into a sound (sound) and outputs the sound
(hereinafter, also simply referred to as "reproduction"). it can.
[0015]
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The music player 101 is configured to be able to convert signals output from various external
devices and music sources into audio signals that can be reproduced by the speaker device 1 and
output the audio signals.
For example, the music player 101 may be an external device wired via a USB (UNIVERSAL Serial
Bus) connection terminal, or an external device wirelessly connected via Wi-Fi (registered
trademark) or Blueto® (registered trademark). May be configured to receive audio-related signals
and output audio signals, or may receive audio-related signals from a music source such as a CD
(Compact Disc) player or radio provided in the music player 101 and output audio signals. It may
be configured to
[0016]
［１−２． Configuration of Speaker Device] Next, the configuration of the speaker device 1
according to the first embodiment will be described with reference to FIGS. 2 to 12.
[0017]
FIG. 2 is a perspective view schematically showing one configuration example of the speaker
device 1 in the first embodiment. FIG. 2 is a perspective view of the speaker device 1 shown in
FIG. 1 as viewed obliquely from the front.
[0018]
As shown in FIG. 2, the speaker device 1 has a rectangular parallelepiped shape which is
vertically elongated in the vertical direction (Z-axis direction). The speaker device 1 is configured
to be supported on a mounting surface (not shown) by a plurality of leg portions 1g provided on
the bottom surface 1f. In the present embodiment, the speaker device 1 includes the four legs 1g.
However, the number of the legs 1g of the speaker device 1 is not limited to four.
[0019]
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The top surface 1 e facing the bottom surface 1 f of the speaker device 1 is configured by the top
board 3. The top board 3 also constitutes a design of the speaker device 1.
[0020]
The speaker device 1 includes a top surface 1e and a bottom surface 1f, and a side surface 1a, a
side surface 1b, a side surface 1c and a side surface 1d adjacent to the top surface 1e and the
bottom surface 1f. In the speaker device 1, the three side surfaces 1 a, the side surfaces 1 b and
the side surfaces 1 c are configured by the exterior net 2. The exterior net 2 also constitutes a
design of the speaker device 1. The side 1a, the side 1b, the side 1c, and the side 1d that form the
four side surfaces of the rectangular parallelepiped form a rectangular cylinder.
[0021]
In the present embodiment, for convenience, the description will be made using three axes of the
X axis, the Y axis, and the Z axis. Hereinafter, the direction from the bottom surface 1 f to the top
surface 1 e is taken as a Z-axis positive direction. The direction from the side 1a (hereinafter also
referred to as "front 1a") that is the front to the side 1d (hereinafter also referred to as "back 1d")
that is the back is taken as the Y-axis positive direction. Further, the direction from the side
surface 1 b toward the side surface 1 c is taken as a positive direction of the X-axis.
[0022]
3 and 4 are perspective views schematically showing one configuration example of the speaker
device 1 according to the first embodiment. 3 is a perspective view showing an aspect in which
the exterior net 2 is removed from the speaker device 1 of FIG. 2, and FIG. 4 is a perspective view
of the speaker device 1 of FIG.
[0023]
5, 6, and 7 are perspective views schematically showing an example of the internal structure of
the speaker device 1 according to the first embodiment. FIG. 5 is a partial cross-sectional view
showing an internal structure by cutting a part of the speaker device 1 shown in FIG. FIG. 6 is a
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perspective view showing an aspect in which the top board 3 and the side wall 31a and the side
wall 31c of the speaker housing 31 are removed from the speaker device 1 shown in FIG. FIG. 7
is a perspective view showing an aspect in which the top plate 3 and the side wall 31 c and the
side wall 31 d of the speaker housing 31 are removed from the speaker device 1 shown in FIG. 4.
[0024]
The following will be described with reference to FIGS. 3 to 7. The speaker device 1 includes a
tweeter unit 10, an upper diffuser unit 20, a woofer speaker unit 30, a lower diffuser unit 40,
and a pedestal unit 50. The tweeter portion 10 is disposed between the top surface 1 e and the
upper diffuser portion 20 and includes a plurality of tweeter units 12. The upper diffuser portion
20, the woofer speaker portion 30 and the lower diffuser portion 40 constitute a woofer portion
60 in the speaker device 1. The woofer unit 60 is configured to take charge of reproduction of
mid-bass in the speaker device 1. The tweeter unit 10 is configured to take charge of
reproduction of middle and high tones in the speaker device 1.
[0025]
The tweeter portion 10 is provided with a tweeter frame 11 having a substantially rectangular
parallelepiped outline. The tweeter frame 11 includes a substantially square frame-like upper
edge portion 11a, four mutually separated column portions 11b, and a rectangular plate-shaped
rear wall portion 11c by integral molding. The four columns 11 b extend from the four corners of
the upper edge 11 a toward the upper diffuser 20 along the Z-axis direction. The rear wall
portion 11c is provided so as to extend between two pillar portions 11b adjacent to each other
on the rear surface 1d side. The rear wall portion 11 c closes between the two support portions
11 b on the rear surface 1 d side. The upper edge portion 11a has a shape in which the top 3 is
fitted in alignment with the inner peripheral side of the upper edge portion 11a.
[0026]
In the tweeter unit 10, inside the tweeter frame 11, three tweeter units 12 which are speakers
capable of reproducing high sound are provided. The three tweeter units 12 are arranged so as
to radiate sound radially toward the front surface 1a, the side surface 1b and the side surface 1c
of the speaker device 1, respectively. That is, the three tweeter units 12 are mutually oriented in
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a plane substantially parallel to the XY plane (in the horizontal direction when the speaker device
1 is mounted on the mounting plane parallel to the horizontal plane). They are arranged to be
substantially orthogonal.
[0027]
The tweeter unit 12 is configured to have a frequency characteristic capable of suitably
reproducing sound in a predetermined high frequency band. The frequency band of the
predetermined high range is, for example, a range from 1 kHz to near 100 kHz, a range from 2
kHz to a frequency exceeding 100 kHz, and the like. The tweeter unit 12 is an example of a
speaker unit, and is also an example of a high sound speaker unit.
[0028]
Furthermore, in the tweeter unit 10, a directivity control horn 13 is attached to each tweeter unit
12. The directivity control horn 13 has a trumpet shape, and is configured to direct the
reproduction sound by the tweeter unit 12. Each of a plurality of directivity control horns 13
extends from one tweeter unit 12, and the direction thereof is set in the direction toward the
front surface 1a, the side surface 1b, or the side surface 1c which is the emission direction of
reproduced sound by the tweeter unit 12 ing. The directivity control horn 13 is opened between
the support portions 11 b of the tweeter frame 11. The directivity control horn 13 is disposed
inside the tweeter frame 11 and fixed to the tweeter frame 11. In other words, each of the three
directivity control horns 13 is arranged such that one emits sound radially towards the front face
1 a and the other emits sound radially towards the side face 1 b And the other one is arranged to
emit sound radially towards the side 1c. The directivity control horn 13 is an example of a horn.
[0029]
The woofer speaker unit 30 is provided with a rectangular parallelepiped speaker housing 31
whose longitudinal direction is the Z-axis direction. The speaker housing 31 has a hollow
structure, and has an internal space 34 inside. The woofer speaker unit 30 has an upper woofer
speaker unit 32 and a lower woofer speaker unit 33. Further, in the speaker housing 31, an
upper wall 31e and a lower wall 31f are disposed in parallel with each other. The upper wall 31 e
is a wall facing to the upper diffuser portion 20, and the lower wall 31 f is a wall facing to the
lower diffuser portion 40. The upper woofer speaker unit 32 is embedded in the opening formed
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in the upper wall 31 e so that the sound output direction is directed to the upper diffuser portion
20. The lower woofer speaker unit 33 is embedded in the opening formed in the lower wall 31 f
so that the sound output direction is directed to the lower diffuser portion 40.
[0030]
The upper woofer speaker unit 32 and the lower woofer speaker unit 33 are configured to have
frequency characteristics capable of suitably reproducing sound in a predetermined mid-basis
frequency band. The predetermined mid-low frequency band is, for example, in the range of 35
Hz to 5000 Hz. The speaker housing 31 is an example of a bass speaker housing.
[0031]
As described above, the installation direction of the upper woofer speaker unit 32 is set to emit
sound toward the upper diffuser portion 20, and the lower woofer speaker unit 33 emits sound
toward the lower diffuser portion 40. The installation direction is set to By providing the upper
woofer speaker unit 32 and the lower woofer speaker unit 33 in the woofer speaker unit 30,
each of the upper woofer speaker unit 32 and the lower woofer speaker unit 33 has, for example,
a relatively small diameter vibration with a diameter of about 8 cm. Even with the plate 32a or
the diaphragm 33a (see FIG. 5), the woofer speaker unit 30 can obtain a relatively large sound
pressure.
[0032]
Furthermore, by providing the upper woofer speaker unit 32 on the upper wall 31 e of the
speaker housing 31 and providing the lower woofer speaker unit 33 on the lower wall 31 f of the
speaker housing 31, the speaker housing 31 can be miniaturized in the XY plane. It becomes
possible to reduce the installation area of the speaker device 1. Each of the upper woofer speaker
unit 32 and the lower woofer speaker unit 33 is an example of a bass speaker unit.
[0033]
The upper diffuser portion 20 is provided with an upper frame 21 having a substantially
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rectangular parallelepiped contour. The upper frame 21 includes four support portions 21 a and
a substantially square plate-like support plate portion 21 b. Each of the four support portions
21a is disposed apart from one another and formed to extend along the Z-axis direction. The
support plate portion 21b is integrally formed with the four support portions 21a. The four
support portions 21 a are disposed at the positions of the four corners of the square upper wall
31 e of the speaker housing 31 and the positions of the four support portions 11 b of the tweeter
frame 11, respectively. The support plate portion 21b is formed extending along the upper wall
31e. The upper woofer speaker unit 32 is disposed through an opening formed in the support
plate portion 21 b and exposes the diaphragm 32 a of the upper woofer speaker unit 32 in the
upper frame 21. The support plate portion 21 b is fixed to the upper wall 31 e of the speaker
housing 31, and the support portion 21 a is fixed to the tweeter frame 11, whereby the upper
frame 21 connects the tweeter portion 10 and the woofer speaker portion 30.
[0034]
Furthermore, a diffuser body 22 is provided in the upper frame 21 in the upper diffuser portion
20. The diffuser body 22 includes a conically projecting diffuser 22a. The diffuser body 22 is
disposed adjacent to the tweeter frame 11 and is fixed to the support portion 21 a of the upper
frame 21. The diffusion portion 22a has an outer shape in which the tip of a cone is rounded, and
has a hollow structure in which the opposite side of the tip is open. The diffusion portion 22 a is
disposed such that the tip of the diffusion portion 22 a protrudes toward the upper woofer
speaker unit 32 and faces the center of the diaphragm 32 a of the upper woofer speaker unit 32.
Therefore, the diffusion unit 22 a diffuses the sound reproduced by the upper woofer speaker
unit 32 substantially uniformly in the direction along the XY plane around the speaker device 1.
For example, when the speaker device 1 is mounted on the mounting surface parallel to the
horizontal surface, the diffusion unit 22a diffuses the sound reproduced by the upper woofer
speaker unit 32 substantially omnidirectionally in 360 degrees in the horizontal direction. Do.
[0035]
FIG. 10 is a side view schematically showing a configuration example of the pedestal portion 50
provided in the speaker device 1 according to Embodiment 1 and the periphery thereof. In
addition, although the diffuser body 42 is attached to the base part 50 as shown in FIG. 5, the
base part 50 which removed the diffuser body 42 is shown in FIG.
[0036]
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The pedestal portion 50 is provided with a box-like pedestal housing 51 which has a square
planar shape and is flattened in the Z-axis direction. At the bottom of the pedestal housing 51, a
plurality of legs 1g and a connection plug (not shown) are provided. The connection plug is a
connection portion for electrically connecting the music player 101 and the speaker device 1
shown in FIG. Furthermore, as shown in FIG. 10, inside the pedestal housing 51, there is provided
a circuit board 52 on which a circuit for controlling the operation of the upper woofer speaker
unit 32 and the lower woofer speaker unit 33 is mounted. The circuit board 52 is disposed to
project into the lower diffuser portion 40 and is electrically connected to the connection plug.
Inside the pedestal housing 51, a weight (not shown) may be provided to improve the stability of
the speaker device 1 mounted on a mounting surface such as a floor.
[0037]
Description will be made with reference to FIGS. 3 to 7 again.
[0038]
The lower diffuser portion 40 is provided with a lower frame 41 having a substantially
rectangular parallelepiped contour.
The lower frame 41 includes four support portions 41 a and four beam portions 41 b. Each of
the four support portions 41 a is disposed apart from one another and formed to extend along
the Z-axis direction. Each of the four beam portions 41 b connects adjacent support portions 41
a to each other. The four support portions 41 a are disposed at the positions of the four corners
of the square lower wall 31 f of the speaker housing 31 and the positions of the four corners on
the side of the pedestal housing 51, respectively. The four beam portions 41 b are respectively
disposed at the end of the support portion 41 a on the base housing 51 side, and extend along
the outer edge of the base housing 51. The lower frame 41 connects the woofer speaker unit 30
and the pedestal unit 50 by fixing the support portion 41 a to the lower wall 31 f of the speaker
casing 31 and the pedestal casing 51.
[0039]
Furthermore, a diffuser body 42 is provided in the lower frame 41 in the lower diffuser portion
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40. The diffuser body 42 includes a conically projecting diffusion portion 42a. The diffusion
portion 42a has a rounded outer shape of the tip of a cone, and has a hollow structure in which
the opposite side of the tip is open. The diffuser body 42 has the same shape as the diffuser body
22. The diffuser body 42 is disposed adjacent to the pedestal housing 51 and is fixed to the beam
portion 41 b of the lower frame 41. The diffusion portion 42 a is disposed such that the tip of the
diffusion portion 42 a protrudes toward the lower woofer speaker unit 33 and is disposed at a
position facing the center of the diaphragm 33 a of the lower woofer speaker unit 33. Therefore,
the diffusion unit 42 a diffuses the sound reproduced by the lower woofer speaker unit 33
substantially equally around the speaker device 1 in the direction along the XY plane. For
example, when the speaker device 1 is mounted on the mounting surface parallel to the
horizontal surface, the diffusion unit 42a makes the sound reproduced by the lower woofer
speaker unit 33 substantially omnidirectional in 360 degrees in the horizontal direction. Spread.
[0040]
Furthermore, the detailed configuration of the woofer speaker unit 30 will be described with
reference to FIGS.
[0041]
The speaker housing 31 of the woofer speaker unit 30 includes a side wall 31a, a side wall 31b, a
side wall 31c, and a side wall 31d adjacent to the upper wall 31e and the lower wall 31f, in
addition to the upper wall 31e and the lower wall 31f.
The side wall 31a is located on the front surface 1a of the speaker device 1, the side wall 31b is
located on the side surface 1b, the side wall 31c is located on the side surface 1c, and the side
wall 31d is located on the back surface 1d.
[0042]
Inside the speaker housing 31, a closed internal space 34 is formed surrounded by the upper
woofer speaker unit 32 and the lower woofer speaker unit 33, and the side walls 31a to 31d, the
upper wall 31e, and the lower wall 31f. ing. For example, as shown in FIG. 5, in the upper woofer
speaker unit 32 and the lower woofer speaker unit 33, the respective diaphragms 32a and 33a
face the internal space 34 and the outside of the speaker housing 31, respectively. It is arranged
as. Furthermore, the upper woofer speaker unit 32 and the lower woofer speaker unit 33 are
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disposed in the internal space 34 at mutually spaced positions in the Z-axis direction. The volume
of the internal space 34 may be, for example, about 800 cubic cm, which is relatively small as the
volume of the speaker housing.
[0043]
An acoustic port 35 is formed on a side wall 31 d located on the back surface 1 d (hereinafter,
also referred to as side wall 31 d on the back surface ), as shown in FIG. 4 by way of example.
The acoustic port 35 is a bass reflex port opened in a circular shape. The acoustic port 35 is
formed by circularly penetrating a port plate 35 a fitted in the side wall 31 d on the back side.
[0044]
Hereinafter, the description will be made with reference to FIGS.
[0045]
FIG. 8 is a side view schematically showing an example of the internal structure of the speaker
device 1 according to the first embodiment.
FIG. 8 shows a side view of the speaker device 1 shown in FIG. 7 from the side wall 31 c side with
the side wall 31 a of the speaker housing 31 removed.
[0046]
FIG. 9 is a perspective view schematically showing one configuration example of the acoustic
tube 36 of the speaker device 1 in the first embodiment. In FIG. 9, the acoustic tube 36 of the
speaker apparatus 1 shown in FIG. 7 is shown alone.
[0047]
In the internal space 34 of the speaker housing 31, an acoustic pipe 36 having a circular in-pipe
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cross section is provided between the upper woofer speaker unit 32 and the lower woofer
speaker unit 33. The sound tube 36 is formed so as to extend in a spiral shape so as to go around
the upper woofer speaker unit 32 and the lower woofer speaker unit 33. Specifically, the acoustic
tube 36 drives a cylindrical vibration generating unit (also referred to as a magnetic circuit unit)
32 b for driving the diaphragm 32 a of the upper woofer speaker unit 32 and a diaphragm 33 a
of the lower woofer speaker unit 33. It has a shape which goes around around the cylindrical
vibration generating part (magnetic circuit part) 33b. A structure for vibrating the diaphragm
32a or the diaphragm 33a according to the audio signal is disposed in each of the vibration
generating unit (magnetic circuit unit) 32b and the vibration generating unit (magnetic circuit
unit) 33b.
[0048]
The acoustic tube 36 may be formed, for example, in a spiral shape in which the bending is
smooth and the bending angle is loose. Furthermore, the acoustic tube 36 may be bent
uniformly. Furthermore, the acoustic tube 36 may be formed to have an outer diameter as large
as possible, which is in contact with the side wall 31a, the side wall 31b, the side wall 31c, and
the side wall 31d of the speaker housing 31. In the first embodiment, the acoustic tube 36 is
formed in a shape having a large outer diameter close to the side wall 31a, the side wall 31b, the
side wall 31c, and the side wall 31d.
[0049]
A flange 36a at one end of the acoustic tube 36 is connected to the port plate 35a (see FIGS. 4
and 9). The acoustic tube 36 has substantially the same inner diameter as the acoustic port 35
and communicates with the acoustic port 35. The other end 36 b of the acoustic tube 36 opens
into the internal space 34 of the speaker housing 31. The acoustic tube 36 and the acoustic port
35 communicate the outside of the speaker housing 31 with the internal space 34 with each
other. Furthermore, the opening of the end portion 36b of the acoustic tube 36 is covered by a
sound absorbing material 37 (acoustic absorber) (see FIG. 6). The sound absorbing material 37 is
configured to have a function of damping and absorbing sound. The sound absorbing material 37
can be formed of, for example, a material such as polyester. The sound absorbing material 37
functions to damp the resonance that occurs due to the length of the acoustic tube 36 (ie, the
port length). That is, the sound absorbing material 37 has an effect of damping the resonance
caused by the port length. The acoustic tube 36 is fixed to the side wall 31 d on the back side of
the speaker housing 31 via the port plate 35 a and the frame member of the sound absorbing
material 37. Note that the sound absorbing material 37 is not essential and may not be provided.
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[0050]
The above-described upper woofer speaker unit 32, lower woofer speaker unit 33, acoustic port
35, acoustic pipe 36, and speaker housing 31 constitute a bass reflex type speaker. In the
speaker device 1 which is a bass reflex type speaker, the spring property of air possessed by the
internal space 34 and the acoustic mass possessed by the acoustic pipe 36 and the acoustic port
35 are the diaphragm 32a of the upper woofer speaker unit 32 and the lower woofer speaker
unit The vibration of the 33 diaphragms 33a can be resonated. That is, the speaker device 1 can
perform bass reflex resonance.
[0051]
When there is no resonance, the sound radiated to the front surface of the diaphragm 32a and
the diaphragm 33a and the sound radiated to the back surface of the diaphragm 32a and the
diaphragm 33a are originally in reverse phase. However, in the speaker device 1, around the
phase of the sound radiated to the back surface of the diaphragm 32a and the diaphragm 33a is
generated by the bass reflex resonance. Therefore, the air in the internal space 34 that resonates
near the bass reflex resonance frequency is combined with the air discharged from the
diaphragm 32 a and the diaphragm 33 a in the direction of the diffuser body 22 and the diffuser
body 42. Thus, the speaker device 1 can increase the sound pressure. Furthermore, the
resonating air may be able to reduce the amplitude of the diaphragm 32a and the diaphragm
33a. The bass reflex resonance frequency is a resonance frequency at the bass reflex resonance.
[0052]
The bass reflex resonance frequency Fb is expressed by the following equation. Fb = ((1 / M · C) ^
(1/2)) / 2π (symbol 表 す represents a power) Note that M is an element related to the acoustic
mass of the acoustic tube 36, and C is an internal space It is an element related to the volume of
34. Due to the bass reflex resonance, an increase in sound pressure by the diaphragm 32a and
the diaphragm 33a, and a decrease in the amplitude of the diaphragm 32a and the diaphragm
33a can be effectively caused.
[0053]
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In the present embodiment, in order to increase the sound pressure in the deep low frequency
range of the upper woofer speaker unit 32 and the lower woofer speaker unit 33, it is preferable
that the upper woofer speaker unit 32 and the lower woofer speaker unit 33 have a bass reflex
frequency. Is set to a predetermined frequency of the deep bass range which is equal to or less
than the frequency band in which the voice can be reproduced. In this case, it is necessary to
increase the elements M and C so as to correspond to a low bass reflex resonance frequency. In
addition, although the predetermined frequency of the above-mentioned deep bass region can be,
for example, in the range of 30 Hz to 50 Hz and the frequency band of sound in the vicinity
thereof, the present disclosure is not limited to these values.
[0054]
Further, in the present embodiment, the determination of the element M and the element C
corresponding to the bass reflex resonance frequency as described above is performed with the
element C relatively smaller. Specifically, the volume of the internal space 34 associated with the
element C is preset to a relatively small volume of, for example, about 800 cubic cm, and the
element M is made relatively large. That is, in the present embodiment, the acoustic tube 36 is
configured such that the acoustic mass becomes relatively large. And in order to enlarge acoustic
mass, acoustic tube 36 is constituted so that an inside diameter is relatively small, and tube
length is relatively long.
[0055]
Further, the increase of the in-pipe speed which is the air speed in the acoustic pipe 36 makes it
easy to generate noise. For this reason, the acoustic tube 36 is configured such that the
frequency at which the in-pipe speed is maximized by the bass reflex resonance is a
predetermined frequency (for example, the frequency of the super low frequency band that is
hardly included in the audio and music signals). May be At this time, the acoustic tube 36 is
configured such that the tube length is relatively long. The super low frequency range may be,
for example, a frequency range of sounds in the range of 10 Hz to 30 Hz and its vicinity.
[0056]
In the above description, the inner diameter of the acoustic tube 36 is set relatively small to
increase the acoustic mass, but the inner diameter of the acoustic tube 36 passes through the
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inside of the long acoustic tube 36 It is also set to reduce the resistance to air.
[0057]
Based on the conditions as described above, the inner diameter and the tube length of the
acoustic tube 36 are determined.
For example, in the present embodiment, when the volume of the internal space 34 is 800 cubic
cm and the bass reflex resonance frequency is 40 Hz, the acoustic tube 36 can be configured by
setting the inner diameter to 16 mm and the tube length to 450 mm. And in order to
accommodate such a relatively long acoustic tube 36 in a relatively small internal space 34, the
acoustic tube 36 is bent.
[0058]
Further, with the above-described configuration of the acoustic tube 36 and the internal space
34, the amplitude of the diaphragm 32a of the upper woofer speaker unit 32 and the diaphragm
33a of the lower woofer speaker unit 33 in the bass reflex frequency and the frequency band in
the vicinity thereof. Is kept small. When the amplitudes of the diaphragm 32a and the diaphragm
33a become relatively small at the bass reflex resonance frequency and the frequency band in
the vicinity thereof, the sound pressure of the above-mentioned frequency band with respect to
the upper woofer speaker unit 32 and the lower woofer speaker unit 33 By performing boost
control to electrically increase the V.sub.x, distortion in the reproduced sound can be suppressed.
On the other hand, when the amplitudes of the diaphragm 32a and the diaphragm 33a are
relatively large in the bass reflex frequency and the frequency band in the vicinity thereof, the
boost control described above is performed on the upper woofer speaker unit 32 and the lower
woofer speaker unit 33. When it is heard, the speech will contain distortion.
[0059]
Furthermore, the shapes of the acoustic tube 36 and the acoustic port 35 may be set to a smooth
shape such as a circle so as to reduce the viscosity resistance of the inner surface.
[0060]
03-05-2019
17
In addition, when the bending of the acoustic tube 36 is relatively steep, friction noise (i.e. wind
noise) by air flowing inside is relatively increased.
In order to suppress this noise, the bending of the acoustic tube 36 may be relatively smooth,
and the bending angle and bending radius of the acoustic tube 36 may be set relatively large.
Furthermore, the bend of the acoustic tube 36 may be made uniform. For example, as shown in
the present embodiment, the acoustic tube 36 has an outer diameter as large as possible
inscribed in the side wall 31a, the side wall 31b, the side wall 31c, and the side wall 31d of the
speaker housing 31, and extends in a spiral shape. The speaker device 1 can satisfy the abovedescribed conditions by adopting the shape described above. Furthermore, by making the
acoustic tube 36 helical, the area occupied by the acoustic tube 36 in the internal space 34 can
also be reduced.
[0061]
Further, since the acoustic tube 36 is disposed between the diaphragm 32 a of the upper woofer
speaker unit 32 and the diaphragm 33 a of the lower woofer speaker unit 33, the acoustic wave
36 of the diaphragm 32 a and the diaphragm 33 a are Vibration waves can be diffused, and
interference between vibration waves can be suppressed. As a result, it is possible to reduce the
occurrence of a standing wave due to interference between the vibration wave of the diaphragm
32a and the vibration wave of the diaphragm 33a. The standing wave is desirably suppressed
because it affects the resonance of the air in the internal space 34.
[0062]
The circuit mounted on the circuit board 52 shown in FIG. 10 controls the operation of the upper
woofer speaker unit 32 and the lower woofer speaker unit 33. However, each of the upper
woofer speaker unit 32 and the lower woofer speaker unit 33 It is also possible to perform
control to electrically boost the operation of. Specifically, the circuit mounted on the circuit board
52 is an upper woofer speaker in a frequency band in which the amplitudes of the diaphragm
32a of the upper woofer speaker unit 32 and the diaphragm 33a of the lower woofer speaker
unit 33 become lower due to bass reflex resonance. By increasing the voltage of the signal
supplied to the unit 32 and the lower woofer speaker unit 33, boost control is performed to
increase the sound pressure of the diaphragm 32a and the diaphragm 33a.
03-05-2019
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[0063]
In the woofer unit 60 including the upper diffuser unit 20, the woofer speaker unit 30, and the
lower diffuser unit 40 having the above-described configuration, the upper woofer speaker unit
32 has the diaphragm 32a with a relatively small diameter, and the lower side Even if the woofer
speaker unit 33 has the diaphragm 33a with a relatively small aperture, it is possible to
reproduce low-pitched sound with low distortion as in the case of a speaker having a diaphragm
with a large aperture.
[0064]
Next, the detailed configuration of the tweeter unit 10 will be described with reference to FIGS.
11 and 12.
[0065]
FIG. 11 is a perspective view schematically showing one configuration example of the tweeter
unit 10 provided in the speaker device 1 according to the first embodiment.
11 is a perspective view of the tweeter portion 10 of the speaker device 1 shown in FIG. 6 as
viewed from a direction different from that in FIG.
[0066]
FIG. 12 is a top view schematically showing one configuration example of the tweeter unit 10
provided in the speaker device 1 according to the first embodiment.
12 is a top view of the tweeter unit 10 shown in FIG. 11 as viewed from above, and is a view
showing the directivity control horn 13 with the upper wall 13c removed.
[0067]
In the tweeter frame 11, in addition to the three tweeter units 12 and the three directivity control
03-05-2019
19
horns 13, a tweeter circuit board 14 on which a circuit for controlling the tweeter unit 12 is
mounted is provided. The tweeter circuit board 14 is attached to the upper frame 21 of the
upper diffuser portion 20 shown in FIG. The circuit mounted on the tweeter circuit board 14 is
electrically connected to the three tweeter units 12 and configured to control the operation of
the tweeter unit 12. Hereinafter, for convenience, each of the three tweeter units 12 is also
referred to as a first tweeter unit 121, a second tweeter unit 122, and a third tweeter unit 123.
Furthermore, each of the three directivity control horns 13 attached to each of the first tweeter
unit 121, the second tweeter unit 122, and the third tweeter unit 123 corresponds to the first
directivity control horn 131 and the second directivity control horn 132. Also referred to as third
directivity control horn 133.
[0068]
The first tweeter unit 121 and the first directivity control horn 131 are set in the direction
toward the front surface 1 a of the speaker device 1, and the second tweeter unit 122 and the
second directivity control horn 132 are on the side surface 1 b of the speaker device 1. The
direction is set in the direction to go, and the direction is set in the direction to go to the side
surface 1 c of the speaker device 1 in the third tweeter unit 123 and the third directivity control
horn 133. Therefore, the first tweeter unit 121 and the first directivity control horn 131, the
second tweeter unit 122 and the second directivity control horn 132, and the third tweeter unit
123 and the third directivity control horn 133 are respectively The orientations are arranged
substantially orthogonal to each other in a plane substantially parallel to the XY plane (in the
horizontal direction when the speaker device 1 is placed on the mounting plane parallel to the
horizontal plane) There is. Furthermore, the second tweeter unit 122 and the second directivity
control horn 132, and the third tweeter unit 123 and the third directivity control horn 133 are
arranged such that their respective directions are substantially opposite to each other. ing. The
first tweeter unit 121 is an example of a first speaker unit, the second tweeter unit 122 is an
example of a second speaker unit, and the third tweeter unit 123 is an example of a third speaker
unit. The first directivity control horn 131 is an example of the first horn, the second directivity
control horn 132 is an example of the second horn, and the third directivity control horn 133 is
an example of the third horn.
[0069]
Each of the first directivity control horn 131, the second directivity control horn 132 and the
third directivity control horn 133 has a fan-shaped bottom wall 13d disposed on the upper
diffuser portion 20 (see FIG. 6) side, and a bottom It includes a fan-shaped upper wall 13c
03-05-2019
20
disposed at a position opposed to the wall 13d, and a side wall 13a and a side wall 13b disposed
between the upper wall 13c and the bottom wall 13d. The top wall 13c and the bottom wall 13d
have substantially symmetrical shapes, such as mirror images. The side wall 13a and the side
wall 13b have a substantially symmetrical shape, such as a mirror image.
[0070]
The first directivity control horn 131, the second directivity control horn 132 and the third
directivity control horn 133 have a trumpet shape having a rectangular cross section by the side
wall 13a, the side wall 13b, the top wall 13c and the bottom wall 13d, respectively. Is formed.
[0071]
Furthermore, the side wall 13a, the side wall 13b, the top wall 13c and the bottom wall 13d of
the first directivity control horn 131 are the opening 13e to which the first tweeter unit 121 is
attached, and the emission direction of the reproduced sound by the first tweeter unit 121 An
opening 13 f on the front surface 1 a side is formed.
[0072]
Further, the side wall 13a, the side wall 13b, the top wall 13c and the bottom wall 13d of the
second directivity control horn 132 are the opening 13e to which the second tweeter unit 122 is
attached and the discharge direction of the reproduced sound by the second tweeter unit 122 An
opening 13 f on the side face 1 b is formed.
[0073]
Further, the side wall 13a, the side wall 13b, the top wall 13c and the bottom wall 13d of the
third directivity control horn 133 are the opening 13e to which the third tweeter unit 123 is
attached and the discharge direction of the reproduced sound by the third tweeter unit 123 An
opening 13 f on the side face 1 c side is formed.
[0074]
Inside the first directivity control horn 131, the second directivity control horn 132 and the third
directivity control horn 133, the side wall 13a, the side wall 13b, the top wall 13c and the
bottom wall 13d open the opening 13e. A diffusion path 13g is formed which spreads like a
trumpet toward the portion 13f.
03-05-2019
21
The bottom wall 13d is an example of a first wall of the horn, and the top wall 13c is an example
of a second wall of the horn.
[0075]
The directions of the first directivity control horn 131, the second directivity control horn 132,
and the third directivity control horn 133 are set such that the central axes 13gc of the
respective diffusion paths 13g are along the XY plane. .
In FIG. 11, only the central axis 13 gc in the diffusion path 13 g of the first directivity control
horn 131 is indicated by an alternate long and short dashed line, and the other central axes 13
gc are not shown.
The central axis 13gc is an axis which is equidistant from each of the side wall 13a and the side
wall 13b, and also equidistant from each of the top wall 13c and the bottom wall 13d.
Thus, when the speaker device 1 is mounted on the mounting surface parallel to the horizontal
plane, each central axis 13gc of the first directivity control horn 131, the second directivity
control horn 132, and the third directivity control horn 133. Is substantially parallel to the
horizontal plane. That is, when the speaker device 1 is used in a normal use state, central axes
13gc of the first directivity control horn 131, the second directivity control horn 132, and the
third directivity control horn 133 extend in the horizontal direction. It becomes substantially
parallel.
[0076]
In the upper walls 13c of the first directivity control horn 131, the second directivity control
horn 132, and the third directivity control horn 133, the diffusion path 13g expands in the Z-axis
direction from the opening 13e toward the opening 13f. To the opposite side (the top plate 3
side) of the upper diffuser portion 20. Furthermore, the width of each upper wall 13c is
increased such that the diffusion path 13g expands in the direction along the XY plane from the
opening 13e toward the opening 13f. In the opening 13 f, the width of each upper wall 13 c is
expanded to the two adjacent pillars 11 b.
03-05-2019
22
[0077]
In the bottom wall 13d of each of the first directivity control horn 131, the second directivity
control horn 132, and the third directivity control horn 133, the diffusion path 13g expands in
the Z-axis direction from the opening 13e toward the opening 13f. To the upper diffuser portion
20 side. Furthermore, the width of each bottom wall 13d is increased so that the diffusion path
13g expands in the direction along the XY plane from the opening 13e toward the opening 13f.
In the opening 13 f, the width of each bottom wall 13 d is expanded to two adjacent pillars 11 b.
[0078]
The bottom wall 13d may be formed so as to be substantially parallel to the XY plane from the
opening 13e to the opening 13f without being inclined toward the upper diffuser portion 20, or
the upper diffuser It may be formed to be inclined to the opposite side of the portion 20. In the
first embodiment, the upper wall 13c is inclined to the opposite side of the upper diffuser portion
20 from the opening 13e toward the opening 13f. Therefore, when the speaker device 1 is placed
on a mounting surface substantially parallel to the horizontal surface, that is, when the speaker
device 1 is in a normal use state, the directivity control horn 13 reproduces the tweeter unit 12
The sound is directed to diffuse in the Z-axis upward direction from the bottom wall 13d to the
top wall 13c.
[0079]
The side walls 13a and 13b of the first directivity control horn 131, the second directivity control
horn 132, and the third directivity control horn 133 respectively diffuse the diffusion path 13g
from the opening 13e toward the opening 13f in the XY plane. It forms along the edge of top
wall 13c and bottom wall 13d so that it may expand in the direction in alignment with. The side
wall 13a includes a bent portion 13aa on the way from the opening 13e to the opening 13f, and
the side wall 13b includes a bent portion 13ba on the way from the opening 13e to the opening
13f. Each of the side wall 13a and the side wall 13b is bent at the bend 13aa and the bend 13ba
such that the distance between the side wall 13a and the side wall 13b increases from the
opening 13e toward the opening 13f. Therefore, the increasing rate of the width of the diffusion
path 13g from the opening 13e to the opening 13f is closer to the bending portion 13aa and the
bending portion 13ba than the opening 13e to the bending portion 13aa and the bending portion
03-05-2019
23
13ba. Is large.
[0080]
Each of the first directivity control horn 131, the second directivity control horn 132, and the
third directivity control horn 133 having the configuration as described above includes the first
tweeter unit 121, the second tweeter unit 122, and the third tweeter unit. The sound reproduced
by 123 can be diffused in the direction along the side walls 13a and 13b (the direction along the
XY plane) and in the direction along the top wall 13c and the bottom wall 13d (the Z-axis
direction). Furthermore, each of the first directivity control horn 131, the second directivity
control horn 132, and the third directivity control horn 133 has a bent side wall 13a and a side
wall 13b as described above, whereby the direction along the XY plane is obtained. Control of the
directional range of sound in (for example, horizontal direction) is possible. That is, each of the
first directivity control horn 131, the second directivity control horn 132, and the third
directivity control horn 133 is reproduced by the first tweeter unit 121, the second tweeter unit
122, and the third tweeter unit 123. The directivity of the sound can be controlled so as to
diffuse while limiting most of the sound to be within the directivity range of a predetermined
directivity angle (for example, 90 degrees in the horizontal direction, etc.).
[0081]
This operation is specifically described with reference to FIG. As shown in FIG. 12, the first
directivity control horn 131 produces most of the sound reproduced by the first tweeter unit
121, and the second directivity control horn 132 produces a large amount of sound reproduced
by the second tweeter unit 122. In the third directivity control horn 133, the third directional
control horn 133 diffuses most of the sound reproduced by the third tweeter unit 123 within the
directivity range A of the directivity angle α in the direction along the XY plane. , Each is
configured. In the present embodiment, directivity range A is defined between line segment L1
and line segment L2 for first directivity control horn 131, second directivity control horn 132
and third directivity control horn 133, respectively. It may be a region of The line segment L1
and the line segment L2 are line segments passing from the diffusion reference point C through
both ends of the opening 13f, specifically, the center of the support 11b. The diffusion reference
point C is a virtual point set on the back of the first tweeter unit 121, the second tweeter unit
122, and the third tweeter unit 123. In FIG. 12, the line segment L1 and the line segment L2 are
indicated by alternate long and short dash lines. And the angle which line segment L1 and line
segment L2 make is directivity angle alpha.
03-05-2019
24
[0082]
In the present embodiment, the directional angle α is 90 degrees. When designing the directivity
control horn 13 (the first directivity control horn 131, the second directivity control horn 132,
and the third directivity control horn 133) of the directivity angle α, sounds of all frequencies
have the directivity angle α. Designing to be directed within the pointing range A is not
necessarily required. Each of the first directivity control horn 131, the second directivity control
horn 132 and the third directivity control horn 133 is the tweeter unit 12 (the first tweeter unit
121, the second tweeter unit 122, or the third tweeter unit 123). May be designed to direct the
sound of the reproducible frequency, or the sound of the frequency that the tweeter unit 12
preferably reproduces, or the sound of the frequency that the tweeter unit 12 normally
reproduces within the directivity range A.
[0083]
The first directivity control horn 131, the second directivity control horn 132, and the third
directivity control horn 133 are such that their directivity ranges A are adjacent to each other
but do not substantially overlap in the direction along the XY plane. Is arranged. As a result, the
reproduced sound of the first tweeter unit 121 released through each of the first directivity
control horn 131, the second directivity control horn 132 and the third directivity control horn
133, and the reproduction of the second tweeter unit 122. The sound and the reproduced sound
of the third tweeter unit 123 can suppress mutual interference. As a result, the speaker device 1
reproduces the respective reproduction sounds of the first tweeter unit 121, the second tweeter
unit 122 and the third tweeter unit 123 in the respective directions of the front surface 1a, the
side surface 1b and the side surface 1c excluding the back surface 1d That is, it can be emitted
with a substantially uniform sound pressure without interruption in a wide pointing range
extending over 270 degrees in the XY plane. That is, the speaker device 1 under normal use
conditions can reproduce substantially omnidirectional sound over 270 degrees in the horizontal
direction.
[0084]
Note that the directivity ranges A of the first directivity control horn 131, the second directivity
control horn 132, and the third directivity control horn 133 are adjacent to one another but do
not substantially overlap with one another. Including one case.
03-05-2019
25
[0085]
The first case is a case where there is a slight gap between adjacent pointing ranges A.
However, this gap is such that changes in sound pressure, sound quality, and the like between
the pointing range A and the area of the gap do not appear as a substantial change in the
measurement result.
[0086]
The second case is a case where adjacent pointing ranges A are directly adjacent without gaps
and without overlap.
[0087]
The third case is a case where adjacent directional areas A slightly overlap each other.
However, this overlap is such that changes in sound pressure, sound quality, and the like due to
interference in the overlap region when compared with the pointing range A do not appear as a
substantial change in the measurement result.
[0088]
［１−３． Example of Speaker Device] The characteristics of the woofer portion were compared
and examined between one example 1 of the speaker device 1 in the present embodiment and
comparative example 1 of a closed type speaker device that is not a bass reflex type.
[0089]
In the first embodiment, the woofer unit 60 sets the internal volume of the speaker housing 31 to
800 cubic cm, the diameters of the acoustic port 35 and the acoustic tube 36 to 16 mm, and the
length of the acoustic tube 36 to 450 mm. Furthermore, the upper woofer speaker unit 32 and
03-05-2019
26
the lower woofer speaker unit 33 have an aperture of 8 cm and a frequency band of 100 Hz to
5000 Hz. The bass reflex resonance frequency was 40 Hz. The internal dimensions of the
speaker housing 31 were about 9 cm in width in the X-axis direction, about 9 cm in depth in the
Y-axis direction, and about 10 cm in height in the Z-axis direction.
[0090]
In the first comparative example, the speaker housing is sealed without providing the acoustic
port 35 and the acoustic tube 36 as compared with the first example. Furthermore, the internal
volume of the speaker housing was 800 cubic cm. The other configuration in Comparative
Example 1 is the same as that in Example 1.
[0091]
FIG. 13 is a diagram schematically showing an example of the relationship between the sound
pressure and the frequency of the woofer unit 60 provided in the speaker device 1 according to
the first embodiment. FIG. 13 shows the relationship between the sound pressure and the
frequency of the woofer portion provided with two woofer speaker units in Example 1 and
Comparative Example 1, Example 1 is a solid line graph, and Comparative Example 1 is a broken
line graph. Indicated. In FIG. 13, the vertical axis represents sound pressure (unit: dB), and the
horizontal axis represents frequency (unit: Hz).
[0092]
FIG. 14 is a diagram schematically showing an example of the relationship between the
amplitude and the frequency of the diaphragm of the woofer speaker unit provided in the
speaker device 1 according to the first embodiment. FIG. 14 shows the relationship between the
amplitude and the frequency of the diaphragm of the woofer speaker unit of the woofer portion
in Example 1 and Comparative Example 1, Example 1 is a solid line graph, and Comparative
Example 1 is a broken line graph. It shows. In FIG. 14, the vertical axis represents amplitude
(unit: mm), and the horizontal axis represents frequency (unit: Hz).
[0093]
03-05-2019
27
FIG. 15 is a diagram schematically showing an example of the relationship between the
impedance and the frequency of the woofer speaker unit provided in the speaker device 1
according to the first embodiment. FIG. 15 shows the relationship between the impedance and
the frequency of the woofer speaker unit of the woofer portion in Example 1 and Comparative
Example 1, in Example 1 by a solid line graph and in Comparative Example 1 by a broken line
graph. . In FIG. 15, the vertical axis represents impedance (unit: Ω), and the horizontal axis
represents frequency (unit: Hz).
[0094]
As shown in FIG. 13, in the first embodiment, the sound pressure of the woofer unit 60 (bass
band) is increased more than that of the first comparative example in the frequency band around
40 Hz, which is the bass reflex resonance frequency There is.
[0095]
On the other hand, as shown in FIG. 14, the amplitude of the diaphragm of the woofer speaker
unit in Example 1 is suppressed to be significantly smaller than that in Comparative Example 1 in
the frequency band around 40 Hz which is the bass reflex resonance frequency.
As described above, in the first embodiment, the sound quality and the reliability of the sound
can be ensured by suppressing the amplitude of the diaphragm in the deep bass region around
40 Hz.
[0096]
Further, as shown in FIG. 15, the impedance of the woofer speaker unit in the first embodiment is
affected by the diaphragm speed due to the bass reflex resonance, and two peaks are generated
in the low band. The impedance of Comparative Example 1 has only one peak because the
speaker housing has a sealed structure and there is one resonant system. In the first
embodiment, there is a bass reflex resonance frequency between two peaks. The lower the
impedance near the frequency, the smaller the amplitude of the diaphragm can be efficiently.
[0097]
03-05-2019
28
［１−３． Effects, Etc.] As described above, in the present embodiment, the speaker device is
provided for each of the plurality of speaker units and the plurality of speaker units, and limits
the spread of the sound output from the speaker unit to a predetermined range. And a plurality
of horns.
[0098]
The speaker device 1 is an example of a speaker device. The plurality of tweeter units 12 (the
first tweeter unit 121, the second tweeter unit 122, and the third tweeter unit 123) are an
example of a plurality of speaker units. The plurality of directivity control horns 13 (the first
directivity control horn 131, the second directivity control horn 132, and the third directivity
control horn 133) are an example of the plurality of horns.
[0099]
For example, in the example shown in the first embodiment, the speaker device 1 includes a
plurality of tweeter units 12 (first tweeter unit 121, second tweeter unit 122, and third tweeter
unit 123), first tweeter unit 121, A plurality provided in each of the two tweeter unit 122 and the
third tweeter unit 123 and limiting the spread of the sound outputted from each of the first
tweeter unit 121, the second tweeter unit 122 and the third tweeter unit 123 to a predetermined
range And a directivity control horn 13 (a first directivity control horn 131, a second directivity
control horn 132, and a third directivity control horn 133).
[0100]
In the speaker device 1 configured as described above, the sound output from each of the
plurality of tweeter units 12 (the first tweeter unit 121, the second tweeter unit 122, and the
third tweeter unit 123) is a plurality of directivity control horns. A plurality of predetermined
ranges are diffused by 13 (a first directivity control horn 131, a second directivity control horn
132 and a third directivity control horn 133).
On the other hand, the sound outputted from each of the first tweeter unit 121, the second
tweeter unit 122 and the third tweeter unit 123 is a first directivity control horn 131, a second
directivity control horn 132 and a third directivity control horn. Since the pointing range is
03-05-2019
29
limited by 133, it is emitted while maintaining a constant sound pressure over a wide range.
Thus, the sound emitted from the plurality of directivity control horns 13 (the first directivity
control horn 131, the second directivity control horn 132, and the third directivity control horn
133) is diffused widely. As a result, the user can listen to the reproduced sound from the first
tweeter unit 121, the second tweeter unit 122, and the third tweeter unit 123 at a relatively wide
range of listening positions with a small change in sound quality.
[0101]
In the speaker device, the plurality of speaker units are arranged in a direction perpendicular to
the first speaker unit, a second speaker unit arranged in the direction perpendicular to the
direction of the first speaker unit, and a direction perpendicular to the direction of the first
speaker unit And a third speaker unit disposed in the direction opposite to the direction of the
second speaker unit.
[0102]
The first tweeter unit 121 is an example of a first speaker unit.
The second tweeter unit 122 is an example of a second speaker unit. The third tweeter unit 123
is an example of a third speaker unit.
[0103]
For example, in the example shown in the first embodiment, the speaker device 1 includes the
first tweeter unit 121, the second tweeter unit 122 disposed in the direction orthogonal to the
direction of the first tweeter unit 121, and the first tweeter unit. And a third tweeter unit 123
disposed in the direction orthogonal to the direction of 121 and in the opposite direction to the
direction of the second tweeter unit 122.
[0104]
Then, in the speaker device 1, the first tweeter unit 121 is disposed facing the front surface 1a of
the speaker device 1, the second tweeter unit 122 is disposed facing the side surface 1b of the
speaker device 1, and the third tweeter unit 123 is disposed It is disposed toward the side 1 c of
the device 1.
03-05-2019
30
As a result, the sound output from the first tweeter unit 121, the second tweeter unit 122, and
the third tweeter unit 123 is diffused over a wide range in front of and to the side of the speaker
device 1. Therefore, the user can clearly hear the sound output from the first tweeter unit 121,
the second tweeter unit 122, and the third tweeter unit 123 at various positions around the
speaker device 1.
[0105]
In the speaker device, the plurality of horns include a first horn provided in the first speaker unit,
a second horn provided in the second speaker unit, and a third horn provided in the third
speaker unit. It is also good. Also, the first horn, the second horn and the third horn are
configured to limit the spread of sound, and are configured to have substantially the same range
in which the spread of sound is limited. It is also good.
[0106]
The first directivity control horn 131 is an example of a first horn. The second directivity control
horn 132 is an example of a second horn. The third directivity control horn 133 is an example of
a third horn.
[0107]
For example, in the example shown in the first embodiment, the speaker device 1 includes the
first directivity control horn 131 provided in the first tweeter unit 121, and the second directivity
control horn 132 provided in the second tweeter unit 122. And a third directivity control horn
133 provided in the third tweeter unit 123. In addition, the first directivity control horn 131, the
second directivity control horn 132, and the third directivity control horn 133 are configured to
limit the spread of sound, and the ranges in which the spread of sound is limited are different
from each other. It is configured to be substantially in the same range.
[0108]
03-05-2019
31
In the speaker device 1 configured as described above, it is possible to equalize the sound
diffused by the first directivity control horn 131, the second directivity control horn 132, and the
third directivity control horn 133. In addition, with regard to the sound output from the first
tweeter unit 121, the second tweeter unit 122, and the third tweeter unit 123, it is possible to
reduce the unevenness of the sound caused by the listening position.
[0109]
In the speaker device, the first horn may have a first opening distal to the first speaker unit. The
second horn may have a second opening distal to the second speaker unit. The third horn may
have a third opening distal to the third speaker unit. The first opening, the second opening, and
the third opening may be disposed along each of three of the four faces forming the rectangular
tube in the speaker device.
[0110]
The opening 13 f of the first directivity control horn 131 is an example of the first opening. The
opening 13 f of the second directivity control horn 132 is an example of a second opening. The
opening 13 f of the third directivity control horn 133 is an example of a third opening. The side
surface 1a, the side surface 1b, and the side surface 1c are examples of three surfaces out of four
surfaces forming a rectangular cylinder in the speaker device.
[0111]
For example, in the example shown in the first embodiment, in the speaker device 1, the first
directivity control horn 131 has an opening 13 f distal to the first tweeter unit 121. The second
directivity control horn 132 has an opening 13 f distal to the second tweeter unit 122. The third
directivity control horn 133 has an opening 13 f distal to the third tweeter unit 123. Each of the
opening 13 f of the first directivity control horn 131, the opening 13 f of the second directivity
control horn 132, and the opening 13 f of the third directivity control horn 133 is a rectangular
cylinder in the speaker device 1. It is disposed along each of three surfaces (side surface 1a, side
surface 1b and side surface 1c) of the four surfaces (side surface 1a, side surface 1b, side surface
1c and side surface 1d) to be formed.
03-05-2019
32
[0112]
In the speaker device 1 configured as described above, the first directivity control horn 131, the
second directivity control horn 132, and the third directivity control horn 133 are arranged such
that the openings 13f do not overlap with each other. Can. Thereby, in the speaker device 1, the
diffusion range of the sound emitted from the first directivity control horn 131, the second
directivity control horn 132 and the third directivity control horn 133 is broadened, and the
sounds interfere with each other. Is reduced.
[0113]
In the speaker device, the plurality of horns may be arranged side by side. Each of the plurality of
horns may include a first wall extending in the arranging direction of the plurality of horns, and a
second wall disposed at a position opposite to the first wall. The second wall may be inclined
with respect to the first wall so as to spread the sound output from the speaker unit in the
direction from the first wall toward the second wall.
[0114]
The bottom wall 13d is an example of a first wall portion. The upper wall 13c is an example of a
second wall.
[0115]
For example, in the example shown in the first embodiment, in the speaker device 1, the first
directivity control horn 131, the second directivity control horn 132 and the third directivity
control horn 133 are arranged side by side with each other. The first directivity control horn
131, the second directivity control horn 132, and the third directivity control horn 133 are
respectively the first directivity control horn 131, the second directivity control horn 132, and
the third directivity control horn 133. And a top wall 13c disposed at a position opposite to the
bottom wall 13d. Each upper wall 13c is provided to the bottom wall 13d so as to spread the
sound output from the first tweeter unit 121, the second tweeter unit 122 or the third tweeter
unit 123 in the direction from the bottom wall 13d to the upper wall 13c. It is inclined.
03-05-2019
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[0116]
When the speaker device 1 configured in this way is placed on a mounting surface substantially
parallel to the horizontal plane, the first tweeter unit 121, the second tweeter unit 122, and the
third tweeter unit 123 are output. The sound is diffused diagonally upward. Therefore, even if
the speaker device 1 is placed on the mounting surface at a relatively low position, the speaker
device 1 can not output the sound output from the first tweeter unit 121, the second tweeter unit
122, and the third tweeter unit 123. Can be sufficiently diffused in the diagonally upper space.
[0117]
The speaker device may include a plurality of high-pitched speaker units as the plurality of
speaker units and may further include a low-pitched speaker unit. The plurality of high-pitched
speaker units and the plurality of horns provided in each of the plurality of high-pitched speaker
units may be disposed above the bass speaker unit.
[0118]
The first tweeter unit 121, the second tweeter unit 122, and the third tweeter unit 123 are an
example of a plurality of high sound speaker units. Each of the upper woofer speaker unit 32 and
the lower woofer speaker unit 33 is an example of a bass speaker unit.
[0119]
For example, in the example shown in the first embodiment, the speaker device 1 includes the
first tweeter unit 121, the second tweeter unit 122, and the third tweeter unit 123, which are an
example of the high-pitched speaker unit, and the bass speaker unit The upper woofer speaker
unit 32 and the lower woofer speaker unit 33 which are examples of this are provided. In the
speaker device 1, the first tweeter unit 121, the second tweeter unit 122 and the third tweeter
unit 123, the first directivity control horn 131, the second directivity control horn 132 and the
third directivity control horn 133 and the like. Are disposed above the upper woofer speaker unit
32 and the lower woofer speaker unit 33.
03-05-2019
34
[0120]
In the speaker device 1 configured as described above, the first tweeter unit 121, the second
tweeter unit 122, and the third tweeter unit 123 for high sound, and the upper woofer speaker
unit 32 and the lower woofer speaker unit 33 for bass are included. Because they are arranged at
different positions, mixing of the respective sounds is suppressed.
[0121]
The speaker device communicates the inside and the outside of the bass speaker housing
provided with the bass speaker unit, the inside and the outside of the bass speaker housing, has a
predetermined length, and is spirally formed in the bass speaker housing. And an acoustic tube
which can be bent and stored.
[0122]
The speaker housing 31 is an example of a bass speaker housing.
The acoustic tube 36 is an example of an acoustic tube.
[0123]
For example, in the example shown in the first embodiment, the speaker device 1 communicates
the inside and the outside of the speaker housing 31 in which the upper woofer speaker unit 32
and the lower woofer speaker unit 33 are provided, and the speaker housing 31. And an acoustic
tube 36.
The acoustic tube 36 has a predetermined length, and is helically bent and stored in the speaker
housing 31. The upper woofer speaker unit 32 and the lower woofer speaker unit 33 may be
attached to the speaker housing 31 so as to face the inside and the outside of the speaker
housing 31.
[0124]
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35
In the speaker device 1 configured as described above, the gas in the speaker housing 31 (that is,
the gas in the internal space 34) is specified by the vibration of the upper woofer speaker unit 32
and the lower woofer speaker unit 33. Resonate at frequency. The speaker device 1 can raise the
sound pressure in the vicinity of the resonance frequency due to the resonance of the gas in the
speaker housing 31. The resonant frequency of the gas in the speaker housing 31 changes
according to the length of the acoustic tube 36. And since the speaker apparatus 1 bends and
stores the acoustic pipe 36 in the helical form in the speaker housing 31, compared with the case
where the acoustic pipe is not bent in the helical form, the length of the acoustic pipe 36 is
longer can do. Therefore, even when the acoustic tube 36 needs to be formed to be relatively
long in order to set the resonance frequency to the target frequency, the speaker device 1 has
the acoustic tube 36 having a relatively long length in the speaker housing 31. It can fit. Thereby,
the amplitude of the diaphragm 32a of the upper woofer speaker unit 32 and the amplitude of
the diaphragm 33a of the lower woofer speaker unit 33 can be reduced in the deep bass range.
Furthermore, by making the acoustic tube 36 helical, the bending of the acoustic tube 36 can be
increased and the bending can be made even. Thereby, the noise which generate ¦ occur ¦
produces in the bending part of the acoustic pipe 36 can be suppressed.
[0125]
The speaker device may further include a diffuser body provided at a position facing the bass
speaker unit outside the speaker housing and diffusing the sound output from the bass speaker
unit. The low-pitched speaker unit may be provided in a direction different from any direction of
the plurality of high-pitched speaker units.
[0126]
Each of the diffuser body 22 and the diffuser body 42 is an example of a diffuser body.
[0127]
For example, in the example shown in the first embodiment, the speaker device 1 is provided
outside the speaker housing 31 at a position facing the upper woofer speaker unit 32, and the
sound output from the upper woofer speaker unit 32 is specified. The diffuser body 22 diffuses
in the direction of.
03-05-2019
36
In addition, the speaker device 1 is provided at a position facing the lower woofer speaker unit
33 outside the speaker housing 31, and diffuses the sound output from the lower woofer speaker
unit 33 in a predetermined direction. Equipped with Furthermore, the upper woofer speaker unit
32 and the lower woofer speaker unit 33 are provided in directions different from any of the first
tweeter unit 121, the second tweeter unit 122, and the third tweeter unit 123.
[0128]
In the speaker device 1 configured as above, the reproduction sound by the upper woofer
speaker unit 32 can be diffused in a wide area, and the reproduction sound by the lower woofer
speaker unit 33 can be diffused in a wide area. Therefore, the speaker device 1 can expand the
directivity range of the reproduced sound by the upper woofer speaker unit 32 and the lower
woofer speaker unit 33. Furthermore, the diffuser body 22 or the diffuser body 42 may change
the direction and diffuse the sound emitted from the upper woofer speaker unit 32 or the lower
woofer speaker unit 33 by colliding with itself. Further, in the speaker device 1, the orientations
of the upper woofer loudspeaker unit 32 and the lower woofer loudspeaker unit 33 are different
from any orientations of the first tweeter unit 121, the second tweeter unit 122, and the third
tweeter unit 123. By arranging each speaker unit, freedom in the arrangement of each speaker
unit is created, so that the speaker device 1 can be miniaturized.
[0129]
In the speaker device 1 according to the present embodiment, the predetermined length of the
acoustic tube 36 is the upper woofer when the velocity of the gas in the acoustic tube 36 is
maximized by the resonance of the gas in the speaker housing 31. The frequencies of the speaker
unit 32 and the lower woofer speaker unit 33 are set to be lower than a predetermined
frequency.
[0130]
In the speaker device 1, when the velocity of the gas in the acoustic tube 36 (intratube velocity)
increases, noise is likely to occur.
The frequency of the upper woofer speaker unit 32 and the lower woofer speaker unit 33 when
the noise is maximized (that is, the velocity of the gas in the acoustic tube 36 is maximized) is
03-05-2019
37
made lower than a predetermined frequency The noise audible to the user can be significantly
reduced by lowering the frequency to, for example, a bass frequency band that hardly includes
reproducible sounds for the upper woofer speaker unit 32 and the lower woofer speaker unit 33.
. The predetermined frequency at this time may be, for example, a bass frequency below the
lowest sound that the upper woofer speaker unit 32 and the lower woofer speaker unit 33 can
reproduce.
[0131]
The speaker device 1 in the present embodiment includes two woofer speaker units (upper
woofer speaker unit 32 and lower woofer speaker unit 33). The speaker device 1 is provided
with a plurality of woofer speaker units (upper woofer speaker unit 32 and lower woofer speaker
unit 33), so that even if the woofer speaker units are small, reproduction of sound at high sound
pressure is possible. Becomes possible.
[0132]
In the speaker device 1 according to the present embodiment, the sound tube 36 is disposed in
the speaker housing 31 so as to face each other (that is, disposed opposite to each other) the
upper woofer speaker unit 32 and the lower woofer speaker unit Placed between 33 and In the
speaker device 1 configured in this manner, the acoustic tubes 36 generate vibration waves
generated by the diaphragm 32 a of the upper woofer speaker unit 32 and the diaphragm 33 a
of the lower woofer speaker unit 33 disposed opposite to each other. Can be suppressed, and the
generation of standing waves generated by the interference between the vibration waves can be
suppressed. Therefore, in the speaker device 1, the influence of the standing wave on the
resonance of the gas in the speaker housing 31 can be suppressed.
[0133]
The speaker device 1 in the present embodiment is the upper woofer speaker unit when the
frequencies of the upper woofer speaker unit 32 and the lower woofer speaker unit 33 exist in
the resonance frequency of the gas in the speaker housing 31 and the frequency band near the
resonance frequency. In order to increase the sound pressure of the lower woofer speaker unit
33 and the lower woofer speaker unit 33, the circuit board 52 is mounted with a circuit for
performing boost control of the upper woofer speaker unit 32 and the lower woofer speaker unit
03-05-2019
38
33. In the speaker device 1, when there is a frequency of the upper woofer speaker unit 32 and
the lower woofer speaker unit 33 in a resonant frequency and a frequency band near the
resonant frequency, the diaphragm 32 a of the upper woofer speaker unit 32 and the lower
woofer speaker unit 33 The amplitude of the diaphragm 33a of However, in the speaker device
1, the sound pressure in the frequency band where the amplitudes of the diaphragm 32 a and
the diaphragm 33 a decrease is increased by the boost control, so that the sound quality after the
sound pressure increase due to the boost can be secured.
[0134]
In the speaker device 1 according to the present embodiment, the first directivity control horn
131, the second directivity control horn 132, and the third directivity control horn 133 adjacent
to each other are adjacent to each other so that the directivity ranges do not substantially overlap
with each other. To be placed. In the speaker device 1 configured as described above,
interference between sounds emitted from the first directivity control horn 131, the second
directivity control horn 132, and the third directivity control horn 133 is suppressed. Therefore,
the sound emitted from the first directivity control horn 131, the second directivity control horn
132 and the third directivity control horn 133 is suppressed in disturbance and diffused in a
wide range while maintaining a constant sound pressure. Be done. As a result, the user can listen
to the reproduced sound from the first tweeter unit 121, the second tweeter unit 122, or the
third tweeter unit 123 at a relatively wide range of listening positions with a small change in
sound quality.
[0135]
In the speaker device 1 according to the present embodiment, the first directivity control horn
131, the second directivity control horn 132, and the third directivity control horn 133 have
their directivity ranges adjacent to each other in a substantially horizontal direction. Be placed. In
the speaker device 1 configured as described above, sound can be widely diffused in the
horizontal direction by the first directivity control horn 131, the second directivity control horn
132, and the third directivity control horn 133. Therefore, in the speaker device 1, it is possible
to reduce the directivity of the reproduced sound by the first tweeter unit 121, the second
tweeter unit 122 and the third tweeter unit 123 in the horizontal direction.
[0136]
03-05-2019
39
The speaker device 1 in the present embodiment includes the tweeter unit 10 and the woofer
unit 60 in an integrated manner. Then, in the speaker device 1, each of the upper woofer speaker
unit 32 and the lower woofer speaker unit 33 of the speaker housing 31 is configured to
improve the sound quality of the deep bass region, and has the first directivity control horn 131
Configuring each of the first tweeter unit 121, the second tweeter unit 122 having the second
directivity control horn 132, and the third tweeter unit 123 having the third directivity control
horn 133 so as to improve the sound quality of the high sound area By this, it is possible to
improve the sound quality of the reproduced sound from the deep bass area to the treble area.
[0137]
Other Embodiments As described above, Embodiment 1 has been described as an example of the
technology disclosed in the present application. However, the technology in the present
disclosure is not limited to this, and can also be applied to an embodiment in which changes,
replacements, additions, omissions, and the like are appropriately made. In addition, it is also
possible to combine the components described in Embodiment 1 above and the other
embodiments described below to create a new embodiment.
[0138]
Therefore, other embodiments will be exemplified below.
[0139]
In the first embodiment, in the speaker device 1, the woofer speaker unit 30 includes the two
woofer speaker units of the upper woofer speaker unit 32 and the lower woofer speaker unit 33.
However, the present disclosure is not limited to this configuration example. The number of
woofer speaker units provided in the woofer speaker unit 30 may be one or three or more.
[0140]
In the first embodiment, in the speaker device 1, the acoustic tube 36 included in the woofer
03-05-2019
40
speaker unit 30 is a spiral tube having a circular cross section and curved to be slippery.
However, the present disclosure is not limited to this configuration example. The acoustic tube
36 may have a predetermined tube length and a predetermined tube internal cross-sectional
area. The internal cross-sectional shape of the acoustic tube 36 is not limited to a circle, and may
be a polygon such as a rectangle, an ellipse, an oval, or the like. Further, the shape of the acoustic
tube 36 is not limited to a spiral shape, and may be any shape as long as it can be accommodated
in the internal space 34. The acoustic tube 36 may have, for example, a spiral shape in the case
of a shape accompanied by bending, a shape which reciprocates in the internal space 34 in the Zaxis direction, a shape which reciprocates in the X-axis or Y-axis direction, or It may be a
combined shape.
[0141]
In the first embodiment, in the speaker device 1, the configuration example in which all the
sound tubes 36 included in the woofer speaker unit 30 are included in the internal space 34 of
the speaker housing 31 has been described. However, the present disclosure is not limited to this
configuration example. The acoustic tube 36 may partially extend to the outside of the speaker
housing 31.
[0142]
In the first embodiment, in the speaker device 1, the tweeter unit 10 is configured to include
three sets of the tweeter unit 12 and the directivity control horn 13. However, the present
disclosure is not limited to this configuration example. The number of sets of the tweeter unit 12
and the directivity control horn 13 provided in the tweeter unit 10 may be two or four. For
example, in a configuration example in which the tweeter unit 10 includes four sets of the
tweeter unit 12 and the directivity control horn 13, the tweeter unit 10 is substantially
omnidirectional in 360 degrees in the horizontal direction around the speaker device 1. The
sound can be played back. In a configuration example in which the tweeter unit 10 includes two
sets of the tweeter unit 12 and the directivity control horn 13, non-directional sound can be
reproduced over a wide area by changing the directivity angle of the directivity control horn 13. .
[0143]
03-05-2019
41
In the first embodiment, in the speaker device 1, the tweeter unit 10 has been described as a
configuration example including the three directivity control horns 13 having the directivity
angle of 90 degrees. However, the present disclosure is not limited to this configuration example.
The directivity angle of the directivity control horn 13 may be other than 90 degrees. Although
in the first embodiment, the tweeter units 12 are arranged at right angles to each other, the
directivity angle of the directivity control horn 13 may be an angle other than 90 degrees.
Further, the directivity angles of the plurality of directivity control horns 13 may be different
from each other.
[0144]
In the first embodiment, in the tweeter unit 10 of the speaker device 1, the three directivity
control horns 13 are configured such that the central axes 13 gc of the three directivity control
horns 13 are arranged along the XY plane. However, the present disclosure is not limited to this
configuration example. In the tweeter portion 10, the central axis 13gc of the directivity control
horn 13 may be along any plane.
[0145]
In the first embodiment, the tweeter unit 10 is arranged on the woofer unit 60 in the speaker
device 1. However, the present disclosure is not limited to this configuration example. The
arrangement form and arrangement order of the woofer portion 60 and the tweeter portion 10
may be any.
[0146]
In the first embodiment, in the woofer unit 60 of the speaker device 1, the upper woofer speaker
unit 32 and the lower woofer speaker unit 33 are arranged vertically. However, the present
disclosure is not limited to this configuration example. The woofer portion 60 may be arranged
in any orientation.
[0147]
03-05-2019
42
In the first embodiment, a configuration example in which the speaker device 1 includes the
tweeter unit 10 and the woofer unit 60 integrally is shown. However, the present disclosure is
not limited to this configuration example. The speaker device 1 may be configured to include
only one of the tweeter unit 10 and the woofer unit 60.
[0148]
In the first embodiment, in the speaker device 1, control is performed such that the circuit
mounted on the circuit board 52 (see FIG. 10) boosts the sound pressure by boosting the upper
woofer speaker unit 32 and the lower woofer speaker unit 33 ( The example of composition
which performs boost control was shown. However, the present disclosure is not limited to this
configuration example. Boost control of the upper woofer speaker unit 32 and the lower woofer
speaker unit 33 may be performed by an external device of the speaker device 1. For example,
the music player 101 may perform boost control on the upper woofer speaker unit 32 and the
lower woofer speaker unit 33. An example of the configuration in that case is shown in FIG.
[0149]
FIG. 16 is a block diagram showing a configuration example of components related to boost
control of the woofer speaker unit provided in the speaker device 1 according to the first
embodiment. When boost control of the upper woofer speaker unit 32 and the lower woofer
speaker unit 33 is performed by the music player 101, the music player 101 performs boost
control, as shown in the block diagram of FIG. And an amplifier 101b. The boost circuit 101a
boosts a signal received from a music source 101c such as a CD player or radio included in the
music player 101, or an external music source 201 such as an external device with which the
music player 101 communicates. The amplifier 101 b amplifies the boosted signal and transmits
the amplified signal to the upper woofer speaker unit 32 and the lower woofer speaker unit 33 of
the speaker device 1. The sound system 100 provided with the speaker device 1 may be
configured in this manner. At this time, the circuit mounted on the circuit board 52 may not have
the control function of the upper woofer speaker unit 32 and the lower woofer speaker unit 33.
The circuit board 52 has only a function as a relay board that relays the electrical connection
between the signal line (lead) connected from the music player 101 to the speaker device 1 and
the upper woofer speaker unit 32 and the lower woofer speaker unit 33. It may be configured to
have. Furthermore, the circuit board 52 may relay the electrical connection between the lead
connected from the music player 101 to the speaker device 1 and the tweeter unit 12.
03-05-2019
43
[0150]
In the first embodiment, in the speaker device 1, the circuit mounted on the tweeter circuit board
14 (see FIG. 12) of the tweeter unit 10 controls the tweeter unit 12. However, the present
disclosure is not limited to this configuration example. Control of the tweeter unit 12 may be
performed by an external device of the speaker device 1. For example, the music player 101 may
control the tweeter unit 12. At this time, the tweeter circuit board 14 is a lead connected from
the music player 101 to the speaker device 1 or a lead extending from the music player 101 via
the circuit board 52 of the pedestal housing 51, and the tweeter unit 12; It may be configured to
have only a function as a relay board for relaying the electrical connection of.
[0151]
In the present embodiment, although the expression "frequency of speaker unit" is used, it means
"frequency of sound being reproduced by the speaker unit" or "frequency of sound reproduced
by the speaker unit". is there.
[0152]
As described above, the embodiment has been described as an example of the technology in the
present disclosure.
For that purpose, the attached drawings and the detailed description are provided.
[0153]
Therefore, among the components described in the attached drawings and the detailed
description, not only components essential for solving the problem but also components not
essential for solving the problem in order to exemplify the above-mentioned technology May also
be included. Therefore, the fact that those non-essential components are described in the
attached drawings and the detailed description should not immediately mean that those nonessential components are essential.
[0154]
03-05-2019
44
In addition, since the above-described embodiment is for illustrating the technique in the present
disclosure, various modifications, replacements, additions, omissions, and the like can be made
within the scope of the claims or the equivalents thereof.
[0155]
The present disclosure is applicable to a speaker device and an apparatus including the speaker
device.
Specifically, the present disclosure is applicable to an audio system including a music player, an
audio-visual system including a monitor such as a television, and an apparatus including various
speaker devices such as a personal computer.
[0156]
DESCRIPTION OF SYMBOLS 1 speaker apparatus 1a side (front) 1b, 1c side 1d side (back) 1e top
1f bottom 2 exterior net 3 top 10 tweeter 11 tweeter frame 11a upper edge 11b support 11c
back wall 12 tweeter unit 13 directivity Control horn 13a, 13b Side wall 13aa, 13ba Curved part
13c Top wall 13d Bottom wall 13e, 13f Opening part 14 Tweeter circuit board 20 Upper diffuser
part 21 Upper frame 21a Support part 21b Support plate part 22, 42 Diffuser body 22a, 42a
Diffusion Section 30 Woofer Speaker Unit 31 Speaker Housing 31a, 31b, 31c, 31d Side Wall 31e
Upper Wall 31f Lower Wall 32 Upper Woofer Speaker Unit 32a, 33a Diaphragm 33 Lower
Woofer Speaker Unit 34 Internal Space 35 Sound Port Port 35a Port plate 36 Acoustic tube 36a
Flange 36b End 37 Sound absorbing material 40 Lower diffuser 41 Lower frame 41a Support
41b Beam 50 pedestal 51 pedestal housing 52 circuit board 60 woofer 100 acoustic system 101
music player 101a Boost circuit 110 Operation unit 101b Amplifier 101c Music source 121 1st
tweeter unit 122 2nd tweeter unit 123 3rd tweeter unit 131 1st directivity control horn 132 2nd
directivity control horn 133 3rd directivity control horn 201 External music source A pointing
range C diffusion reference point L1, L2 line segment
03-05-2019
45

JPS58127782

JPS5994494

JPS60124189

JPS604092

JPS58173990

JPS5978782

JPS60172491

JPS59129293

JPS5936685

JPS58174349