close

Вход

Забыли?

вход по аккаунту

JP2012049663

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2012049663
An object of the present invention is to provide a ceiling speaker device capable of localizing
sound not only above the listener but also to the side with only a speaker device installed on a
ceiling. SOLUTION: A direct sound generating speaker 3 and a reflected sound generating
speaker 4 are provided in the same package 2, and the reflected sound generating speaker 4 is a
directional speaker and is directed to the lower side wall 12 of the room 10. The localization of
the sound 6 output from the speaker 4 for generating a reflected sound in the specific area 7 of
the room 10 is lower than the localization of the sound 5 output from the speaker 3 for
generating a direct sound. Then, a delay circuit 23 for delaying the sound 5 output from the
direct sound generation speaker 3 is provided, and the reflection output from the reflected sound
generation speaker 4 rather than the direct sound 5 output from the direct sound generation
speaker 3 The sound 6 is made to reach the target area 7 earlier. [Selected figure] Figure 1
Ceiling speaker device
[0001]
The present invention relates to a ceiling speaker device installed on a ceiling.
[0002]
In the audio device, the player device and the display device are generally installed on a floor or
the like, but the installation positions of the speakers are variously devised.
10-05-2019
1
For example, placing the speakers on the ceiling does not occupy the floor at all. However, when
the speaker is installed on the ceiling, the sound is localized at the upper side and sounds
extremely unnatural to the listener (audio equipment user).
[0003]
Therefore, when the speaker device disclosed in Patent Document 1 is implemented, the sound
emitted from the ceiling side is reflected by the side wall and can be heard from the side of the
listener (that is, the sound is localized to the side of the listener).
[0004]
Unexamined-Japanese-Patent No. 9-233591
[0005]
By the way, the speaker device disclosed in Patent Document 1 localizes the sound in the
direction in which the display device (various display devices, the screen of the projector, etc.) is
installed, thereby making the direction in which the image can be seen and the direction in which
the sound is heard. It is a match.
Therefore, despite the fact that the speakers are arranged on the ceiling, all the sound is localized
to the side of the listener, and as a result, the listener is placed in a less realistic environment.
[0006]
For example, when reproducing the situation where birds fly away while singing in a radio
broadcast unrelated to the image, if the direction in which the birds cries can be heard changes
from the side of the listener to the head, the birds may actually be Listeners can feel as if they are
flying around.
[0007]
However, in order to reproduce such a situation with a conventional speaker device, the only way
is to arrange the speakers on the side and the head of the listener and control the sound emitted
from the individual speakers.
10-05-2019
2
[0008]
Then, an object of this invention is to provide the ceiling speaker apparatus which can make a
sound localize not only the upper direction of a listener but to the side only by the speaker
apparatus installed in a ceiling.
[0009]
Invention of Claim 1 for solving the above-mentioned subject is a ceiling speaker device installed
in a ceiling of a room, and it is provided with a speaker for direct sound generation and a speaker
for reflected sound generation in the same package, for reflected sound generation. The speaker
is a directional speaker and is directed toward the lower side wall of the room, and localization of
the sound output from the speaker for generating a reflected sound in a specific area of the room
is based on localization of the sound output from the speaker for generating a direct sound Is a
ceiling speaker device characterized by lowering.
[0010]
In the invention of claim 1, the speaker for direct sound generation and the speaker for reflected
sound generation are provided in the same package, and the speaker for reflected sound
generation is a directional speaker and is directed to the lower side wall direction of the room.
Because the localization of the sound output from the speaker for reflected sound generation in
the specific area is lower than the localization of the sound output from the speaker for direct
sound generation, the person in the specific area can not only hear the direct sound from the
ceiling, You can also hear the reflection from the side.
As a result, it is possible to lower the localization of part of the sound output from the speaker
device.
Therefore, the person in the target area can hear the sound naturally.
Here, the specific area of the room is an area where the listener can listen to the sound emitted
from each speaker in a comfortable posture.
[0011]
The invention of claim 2 is provided with a delay circuit for delaying the direct sound output
10-05-2019
3
from the direct sound generation speaker, and the reflected sound output from the reflected
sound generation speaker rather than the direct sound output from the direct sound generation
speaker The ceiling speaker device according to claim 1, wherein the second speaker reaches the
specific area more quickly.
[0012]
According to the second aspect of the invention, since the delay circuit for delaying the direct
sound output from the direct sound generation speaker is provided, the timing at which the
reflected sound reaches the person in the specific area can be delayed.
Since the reflected sound output from the reflected sound generation speaker reaches the
specific area earlier than the direct sound output from the direct sound generation speaker, the
direction of arrival of the sound is lateral to the person in the specific area. Can be recognized as
[0013]
In the speaker apparatus of the present invention, a speaker for direct sound generation and a
speaker for reflected sound generation are provided in the same package in the ceiling of a room,
and a person in a specific area can not only hear direct sound from the ceiling but also sideways.
You can also hear the reflected sound from
As a result, it is possible to lower the localization of part of the sound output from the speaker
device.
Therefore, the person in a specific area can hear the sound naturally.
[0014]
It is a front view of the room provided with the ceiling speaker device of the present invention. It
is a front view of the room provided with the ceiling speaker apparatus different from FIG. (A)-(d)
is a circuit diagram of the ceiling speaker apparatus of this invention, respectively.
10-05-2019
4
[0015]
Hereinafter, embodiments of the present invention will be described with reference to the
drawings.
[0016]
As shown in FIG. 1, a sound source 8 and a ceiling speaker device 1 embodying the present
invention are installed in a room 10 having a ceiling 11, side walls 12 and a floor surface 13.
The sound source 8 is installed on the floor surface 13, and the ceiling speaker device 1 is fixed
to the ceiling 11. In addition, the ceiling speaker device 1 is connected to the sound source 8
through a signal line 9. That is, an audio signal emitted by the sound source 8 is input to the
ceiling speaker device 1 through the signal line 9. The sound source 8 is, for example, a
reproduction device (player device) of various media, a radio, a television, or the like.
[0017]
The ceiling speaker device 1 has a housing 2 (package). In the housing 2, a main speaker 3
(speaker for direct sound generation), a directional speaker 4 (speaker for reflected sound
generation), amplifiers 20 and 21, a filter circuit 22, and a delay circuit 23 are provided. In the
housing 2, the main speaker 3 is fixed in a posture pointing downward.
[0018]
The directional speaker 4 is fixed in the housing 2 so that the radiation direction of the sound
exhibits an angle in the range of, for example, 30 degrees to 75 degrees with respect to the
vertical direction. As a result, the radiation direction of the voice of the directional speaker 4 is
set so that the output sound is reflected by the side wall 12 or the floor 13 of the room 10 and
reaches a target area 7 (a specific area of the room 10) described later. Be done.
[0019]
10-05-2019
5
A target area 7 (specific area) is set in the room 10. That is, the target area 7 is an area where the
sound (direct sound 5) output from the main speaker 3 and the sound (reflected sound 6) output
from the directional speaker 4 reach. The target area 7 is set so that the person in the room 10
can listen to the sound output from the ceiling speaker device 1 in a comfortable posture.
[0020]
As shown in FIG. 3A, a signal line 9 is connected to the directional speaker 4 in the housing 2. An
amplifier 20 is provided between the signal line 9 and the directional speaker 4. Therefore, the
audio signal output from the sound source 8 is amplified by the amplifier 20 and reaches the
directional speaker 4, and the directional speaker 4 outputs audio (reflected sound 6).
[0021]
Assuming that the ceiling speaker device 1 is installed at the center of the ceiling 11 of the room
10 whose vertical and horizontal dimensions are 360 cm and 240 cm, respectively, the
directivity speaker 4 is at an angle of 60 degrees to 75 degrees with respect to the vertical
direction. When the sound is emitted, the emitted sound is reflected by the side wall 12 so that
the reflected sound 6 reaches the ear of a person of 160 cm in height standing in the area on the
center side of the room (the area at least 80 cm away from the side wall).
[0022]
On the other hand, as shown in FIG. 3A, a signal line 9 a is connected to the signal line 9.
The signal line 9 a is connected to the main speaker 3 through the delay circuit 23 and the
amplifier 21. That is, the audio signal output from the sound source 8 is input to the delay circuit
23 through the signal lines 9 and 9a. The audio signal input to the delay circuit 23 is input to the
amplifier 21 after being delayed by a predetermined time, amplified by the amplifier 21, and the
audio (direct sound 5) is output from the main speaker 3. As a result, the direct sound 5 reaches
the target area 7 delayed by a predetermined time than the reflected sound 6.
[0023]
10-05-2019
6
That is, in the example shown in FIG. 3A, the delay circuit 23 is provided on the signal line 9 a,
and the audio signal output from the sound source 8 reaches the directional speaker 4 earlier
than the main speaker 3. Then, the voice is first output from the directional speaker 4, and the
delay circuit 23 delays the predetermined time and the voice signal reaches the main speaker 3,
and the voice is also output from the main speaker 3.
[0024]
As a result, the sound output from the directional speaker 4 is reflected by the side wall 12 and
the reflected sound 6 reaches the target area 7 where the listener 15 is located, and the direct
sound 5 output from the main speaker 3 behind the reflected sound 6 Reaches the target area 7.
The time difference between the reflected sound 6 and the direct sound 5 reaching the target
area 7 is about 0.03 seconds to 0.1 seconds.
[0025]
The sense of the person can easily recognize that the direction heard earlier is the arrival
direction of the sound, so that the localization of the sound emitted from the ceiling speaker
device 1 moves below the ceiling 11. That is, by providing the delay circuit 23 in the signal line 9
a, localization of the sound can be moved below the ceiling 11.
[0026]
Next, in the example shown in FIG. 3B, the filter circuit 22 is provided on the signal line 9 instead
of using the delay circuit 23 provided on the signal line 9a in FIG. 3A. The filter circuit 22 is, for
example, a known low pass filter, and passes only an audio signal of sound in a low frequency
region. Therefore, only the sound in the low frequency range is output from the directional
speaker 4. As a result, in the sound output from the sound source 8, the localization of the sound
in the low frequency region moves below the ceiling 11. For example, human voice (range 800 to
3 kHz) can be extracted by the filter circuit 22 and output from the directional speaker 4 so that
the listener 15 can feel natural from a low position.
10-05-2019
7
[0027]
Next, in the example shown in FIG. 3C, the filter circuit 22 is provided on the signal line 9, and
the delay circuit 23 is provided on the signal line 9a. As a result, the bass (reflected sound 6)
output from the directional speaker 4 reaches the target area 7 earlier than the direct sound 5.
This can give the listener 15 a sense of realism.
[0028]
Finally, in the example shown in FIG. 3D, the switch 24 is provided on the signal line 9, and the
switch 25 is provided on the signal line 9a. The signal line 9b branches off in the middle of the
signal line 9a. The switch 24 can switch and connect the directional speaker 4 to either the filter
circuit 22 side or the signal line 9 b side. The switch 25 can be switched and connected to either
the delay circuit 23 side or the signal line 9 b side. Incidentally, in the state shown in FIG. 3D, the
switch 24 is switched to the filter circuit 22 side, and the switch 25 is switched to the signal line
9b side, so that the circuit shown in FIG. Perform the same function. Similarly, it is also possible
to realize the circuits shown in FIG. 3A and FIG. 3C by switching the switch 24 and the switch 25.
[0029]
Therefore, when the switch 24 is switched to the filter circuit 22 side, only the low frequency
sound (reflected sound 6) is outputted from the directional speaker 4 and when the switch 25 is
switched to the delay circuit 23 side, a predetermined time from the main speaker 3 The direct
sound 5 is output with a delay. That is, by switching the switches 24 and 25 according to the
situation, the listener 15 can be given a rich sense of reality.
[0030]
The filter circuit 22 and the delay circuit 23 can adopt well-known circuits. For example, one
using digital signal processing or one using a capacitor can be adopted. The filter circuit may be
a combination of a high pass filter and a low pass filter using a resistor and a capacitor or an
inductor and a capacitor, a band pass filter, or a digital filter using digital signal processing.
10-05-2019
8
[0031]
As the main speaker 3, a cone type, a dome type, a flat type, a bending wave type or the like can
be adopted. Further, as the shape of the housing 2 incorporating the main speaker 3 and the
directional speaker 4, a cylindrical shape, a quadrangular prism shape (polygonal prism shape) or
the like can be adopted.
[0032]
In the example shown in FIG. 1, the sound output from the directional speaker 4 is reflected by
the side wall 12 to generate the reflected sound 6, and the reflected sound 6 reaches the target
area 7, but the reflected sound is further transmitted to the floor surface. It is also possible to
reflect at 13. That is, as shown in FIG. 2, the direction of the directional speaker 4 is changed,
and the emitted sound is reflected by the side wall 12 to produce the reflected sound 6a, and the
reflected sound 6a is further reflected by the floor 13 to be reflected sound 6b. To cause the
reflected sound 6 b to reach the target area 7.
[0033]
As shown in FIG. 2, when the reflected sound 6b is generated, the reflected sound 6b is directed
from the floor surface 13 side to the target area 7, so that the localization of the sound can be
further lowered than the reflected sound 6 shown in FIG.
[0034]
Although one directional speaker 4 is used in the example shown in FIG. 1 and FIG. 2, a plurality
of directional speakers 4 can also be used.
For example, four directional speakers 4 shown in FIG. 1 may be used, each of which may output
sound toward the square side walls (12). It is also possible to generate a reflected sound 6b
which is reflected by the floor 13 as shown in FIG. By using a plurality of directional speakers 4
in this manner, it is possible to obtain a realistic sound effect.
10-05-2019
9
[0035]
Further, if only a sound in a specific frequency domain is extracted from the audio signal input to
each directional speaker 4 by a filter circuit (low pass filter or high pass filter) and emitted to the
target area 7 as a reflected sound, a more realistic sensation Improve.
[0036]
That is, a plurality of directional speakers 4 are used to make full use of the situation in which a
train or car moves from left to right or the situation in which a bird flies diagonally from the
lower front to the upper rear (the direction of each directional speaker 4 Can be set individually,
or can be reproduced by outputting only the sound of the frequency of a specific region by a
filter circuit.
[0037]
1 Ceiling Speaker Device 2 Housing (Package) 3 Main Speaker (Speaker for Direct Sound
Generation) 4 Directional Speaker (Speaker for Reflected Sound Generation) 5 Direct Sound 6
Reflected Sound 7 Target Area (Specific Area of Room) 8 Sound Source 9, 9a, 9b signal line 10
room 11 ceiling 12 side wall 13 floor 20, 21 amplifier 22 filter circuit 23 delay circuit
10-05-2019
10
1/--страниц
Пожаловаться на содержимое документа