JPH06225378

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 JPH06225378
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker apparatus used for video equipment such as a television receiver and a television
receiver using the same.
[0002]
2. Description of the Related Art A method of providing a horn or an acoustic tube on the front of
a speaker and guiding a sound wave generated from the speaker to the opening provides a large
output sound pressure as compared to the case where the horn or the acoustic tube is not used.
There is an advantage that sound is transmitted in a specific direction, etc., and it has been
widely used conventionally.
[0003]
Hereinafter, a speaker device using a conventional acoustic tube will be described with reference
to the drawings.
FIG. 3 is a plan view partially showing the structure of a conventional speaker apparatus using an
acoustic tube. In FIG. 3, 1 is a speaker, 2 is an acoustic tube having the speaker 1 attached, 3 is
an opening of the acoustic tube 2, 4 is a baffle plate of the acoustic tube 2 having the speaker 1
attached, and 5 is provided on the front of the speaker 1 A reflector 6, 6 is an acoustic tube side
03-05-2019
1
wall of an acoustic tube 2, 7 is a sound absorbing material, 8 is a sound absorbing material 7
inserted into the interior of the acoustic tube 2 and disposed on the upper portion of the sound
absorbing material 7 to form an outer wall of the acoustic tube 2. A sound absorbing material
cover 9 shows an adhesive material in which the sound absorbing material cover 8 and the
acoustic pipe 2 are fixed.
[0004]
FIG. 4 is an acoustic characteristic diagram showing acoustic characteristics of the conventional
speaker device. The operation of the speaker apparatus using the conventional acoustic tube 2
configured as described above will be described below. As shown in FIG. 3, the sound wave
emitted from the speaker 1 is guided to the opening 3 through the sound conduction formed by
the reflection plate 5.
[0005]
The sound absorbing material 7 disposed inside the acoustic tube 2 is provided to remove
standing waves generated inside the acoustic tube 2, and as shown in FIG. 4, the sound absorbing
material 7 is provided inside the acoustic tube 2. In the absence of the sound absorption
characteristics as shown by the broken line, there are many peak dips, but by providing the
sound absorbing material 7 it is possible to improve the sound characteristics as shown by the
solid line.
[0006]
As described above, in the case of a television receiver equipped with the conventional speaker
device having a long and substantially rectangular opening, the television receiver can be
miniaturized and slim, and sound reproduction close to nature can be achieved. It is a thing.
[0007]
However, in the above-described conventional configuration, when it is intended to further
reduce the peak dip on the acoustic characteristics, it is necessary to dispose a larger amount of
the sound absorbing material 7 inside the acoustic tube 2. In this case, the sound wave of the
high frequency component is significantly attenuated, which is not satisfactory as a speaker
device. Therefore, in the case of the conventional speaker device described above, the sound
absorbing material 7 is disposed in an appropriate amount and peak dip on the acoustic
characteristics to some extent. By configuring the speaker device in a state in which the sound
pressure level remains, the sound pressure level from the low frequency component to the
03-05-2019
2
middle high frequency component is balanced, and means for realizing acoustic reproduction
close to nature are used. When it sees as a speaker apparatus for, it had the problem that it was
not fully satisfactory.
[0008]
The present invention solves the above-mentioned conventional problems, and it is an object of
the present invention to provide a speaker device capable of achieving downsizing of a television
receiver and achieving higher sound quality and a television receiver using the same. It is
[0009]
SUMMARY OF THE INVENTION In order to solve this problem, a speaker apparatus according to
the present invention comprises an acoustic tube coupled to the front of the speaker for guiding
a sound wave having a long and substantially rectangular opening. A first reflector disposed
inside in a direction of radiation of sound waves radiated from the speaker to form a sound
guide, and a first reflector provided between the first reflector and the acoustic tube side wall A
sound absorbing material, and a second reflecting plate provided between the first sound
absorbing material and the baffle plate on which the speaker is mounted, the second reflecting
plate and the second baffle plate A sound absorbing material is disposed, and a part of the
second sound absorbing material forms the outer wall of the sound pipe, and the first sound
absorbing material and the second sound absorbing material are the second reflection plate and
the sound pipe side wall. It is set as the structure arrange ¦ positioned adjacent via the cavity
which was comprised.
[0010]
[Operation] With this configuration, even in the speaker device in which the opening is made into
an elongated rectangular shape in consideration of incorporation into the device, and further,
slimming of the opening of the acoustic tube is made, a specific frequency determined by the
length of the acoustic tube Generation of peak dips on the acoustic characteristics due to
standing waves generated by the light source can be significantly attenuated by the second
reflector and the second sound absorbing material provided inside the acoustic tube, and the
television receiver can be miniaturized and miniaturized Can further improve the sound quality.
[0011]
An embodiment of the present invention will be described below with reference to the drawings.
03-05-2019
3
The same reference numerals as in FIG. 3 denote the same parts.
[0012]
FIG. 1 is a plan view partially showing the structure of a speaker device according to an
embodiment of the present invention.
In FIG. 1, 1 is a speaker, 2 is an acoustic pipe, 3 is an opening of the acoustic pipe 2, 4 is a baffle
plate, 6 is an acoustic pipe side wall, 8 is a sound absorbing material cover, 9 is an acoustic pipe
2 and a sound absorbing material cover 8 Adhesive fixed on the front face of the speaker 1, 10 is
a first sound absorbing material provided between the first reflection plate 10 and the acoustic
tube side wall 6, A second reflection plate provided between the first sound absorbing material
11 and the baffle plate 4 to which the speaker 1 is attached, 13 is a second sound absorption
disposed between the second reflection plate 12 and the baffle plate 4 It is a material.
[0013]
FIG. 2 is an acoustic characteristic diagram showing acoustic characteristics of the speaker
device according to the embodiment of the present invention shown in FIG.
[0014]
In the case of the speaker device according to the present invention configured as described
above, even in the speaker device in which the opening 3 of the acoustic tube 2 is slimmed, a
standing wave generated at a specific frequency determined by the length of the acoustic tube 2
It is possible to significantly attenuate the occurrence of peak dips on the acoustic characteristics
due to noise, and as shown in the acoustic characteristics diagram of FIG. And realize natural
sound reproduction.
[0015]
The mechanism of the acoustic characteristic flattening realization of the speaker device
according to the embodiment of the present invention will be described below.
[0016]
Sound waves radiated from the speaker 1 into the acoustic tube 2 are guided by the reflector 10
03-05-2019
4
to the opening 3 of the acoustic tube 2 without causing attenuation of high-frequency
components, and constant waves generated in the acoustic tube 2 The existing wave is largely
reduced by the first sound absorbing material 11 and the second sound absorbing material 13,
and the second reflection plate provided between the first sound absorbing material 11 and the
second sound absorbing material 13 The sound wave reflected by the baffle plate 4 through the
cavity constituted by the 12 and the second reflecting plate 12 and the acoustic tube side wall 6
makes it possible to control the attenuation of the midrange component.
[0017]
In addition, since a part of the second sound absorbing material 13 forms the outer wall of the
acoustic pipe, absorption of the standing wave can be effectively realized with a small amount of
the sound absorbing material, and the sound wave of the standing wave component The peak dip
on the acoustic characteristic can be largely attenuated by releasing a part of the sound
absorption material from one side of the second sound absorbing material 13 forming the outer
wall of the acoustic pipe, and high sound quality can be realized.
[0018]
As described above, according to the present invention, an acoustic tube for guiding a sound
wave having a long and substantially rectangular opening is coupled to the front of the speaker,
and the inside of the acoustic tube is connected to the sound wave emitted from the speaker. A
first reflector disposed in the radial direction to form a sound conductor, a first sound absorbing
material provided between the first reflector and the acoustic tube side wall, a first sound
absorbing material and a speaker And a second reflecting plate provided between the first and
second baffles, and a second sound absorbing material disposed between the second reflecting
plate and the baffle plate, and the second sound absorbing material The first sound absorbing
material and the second sound absorbing material are disposed adjacent to each other via a
cavity formed of the second reflection plate and the sound tube side wall, while a part of the
structure forms the outer wall of the sound tube. Further high sound quality of the speaker
device capable of miniaturizing the television receiver by adopting the configuration One in
which it is possible.
03-05-2019
5

Download Report