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DESCRIPTION JPH06237498

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DESCRIPTION JPH06237498
[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.
Also, it has the advantage of transmitting sound in a specific direction, etc., and has been widely
used conventionally.
[0003]
Hereinafter, a speaker device using a conventional acoustic tube will be described with reference
to the drawings.
FIG. 4 is a perspective view showing a television receiver and a speaker device, which is
configured by mounting the above-described speaker device using the above-described acoustic
tube, with a partially cutaway cross section. In FIG. 4, 1 is a speaker, 2 is an acoustic tube
attached with the speaker 1, 3 is a rear cabinet installed on the back of the speaker 1, 4 is a bass
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reflex port for enhancing the low frequency located above and below the acoustic tube 2, 5 is
Reference numeral 6 denotes a cathode ray tube, 7 denotes an opening of the acoustic tube 2, 8
denotes a sound absorbing material, 9 denotes a reflector, and 10 denotes a tweeter.
[0004]
The function of the television receiver constructed by incorporating the speaker device using the
conventional acoustic tube 2 configured as described above will be described below. As shown in
FIG. 4, the acoustic tube 2 to which the speaker 1 is attached is built in along the cathode ray
tube 6 inside the television receiver, and the television cabinet 5 is further placed along the
acoustic tube 2. It is possible to miniaturize a television receiver.
[0005]
Further, the speaker device is optimally installed in accordance with the length and shape of the
acoustic tube 2 in order to guide the sound wave radiated from the speaker 1 to the inside of the
acoustic tube 2 more naturally to the opening 7 of the acoustic tube 2 A sound absorbing
material 8 and a reflecting plate 9 for removing standing waves generated inside the acoustic
tube 2 are provided, and a tweeter 10 for high frequency reproduction is disposed inside the
acoustic tube 2 and further The bass reflex port 4 for low-frequency enhancement is disposed
above and below the acoustic tube 2, whereby high sound quality of the television receiver can
be achieved.
[0006]
However, in the above-described conventional configuration, it is possible to more efficiently
enhance the low range reproduction band by arranging the low range enhancing bass reflex port
4 close to the upper and lower sides of the acoustic tube 2. Although it is possible, on the other
hand, the sound wave emitted from the acoustic tube 2 is disturbed by the sound wave emitted
from the low-pass boost bass reflex port 4 and the peak dip when viewed in the sound pressure
frequency characteristics in the middle and high-reproduction band. It has a problem that it can
not be avoided that the sound quality has a sense of incongruity in a specific frequency band.
[0007]
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 higher quality of a
television receiver and a television receiver using the same. .
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[0008]
SUMMARY OF THE INVENTION In order to solve this problem, the speaker device and the
television receiver using the same according to the present invention have an elongated opening
on the front surface of the speaker and are formed in a shape close to a substantially rectangular
shape. An acoustic tube for guiding the acoustic wave is connected, and a part of the wall surface
of the low-pass intensifying bass reflex port disposed close to one side or both sides of the
rectangular side wall constituting the acoustic tube is configured using a sound absorbing
material. is there.
[0009]
[Operation] With this configuration, the opening of the acoustic tube is formed into an elongated
rectangular shape in consideration of incorporation into the device, and the sound emitting
portion of the bass reflex port for low-frequency enhancement is disposed in the vicinity of the
acoustic tube opening. Even in the speaker device that also improves the characteristics, a part of
the wall surface of the bass reflex bass reflex port is configured using a sound absorbing
material, so that the sound is radiated from the acoustic pipe by the sound wave radiated from
the bass boost bass reflex port. Since it is possible to prevent the sound wave being disturbed, it
is possible to further improve the sound quality.
[0010]
An embodiment of the present invention will be described below with reference to the drawings.
The same reference numerals as in FIG. 4 described in the above-mentioned conventional
example indicate the same parts.
[0011]
FIG. 1 is a perspective view showing a part of a speaker device according to an embodiment of
the present invention.
In FIG. 1, 1 is a speaker, 2 is an acoustic tube for guiding a sound wave having an opening
portion disposed on the front surface of the speaker 1 in an elongated, substantially rectangular
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shape, 3 is a rear cabinet, 4 is an acoustic tube 2 Low-pass intensifying bass reflex port arranged
close to one side of the rectangular side wall, 7 is the opening of the acoustic tube 2, 8 is a sound
absorbing material disposed inside the acoustic tube 2, 9 is formed inside the acoustic tube 2 A
reflector 10, a tweeter 10 for high frequency reproduction, an opening 11 of a bass reflex port 4
for low frequency enhancement, and a rectangular side wall 12 constituting the acoustic tube 2
and a bass reflex port 4 for low frequency enhancement Reference numeral 13 denotes a sound
absorbing material configured to form the remaining part of the wall surface of the low-pass
intensifying bass reflex port 4.
[0012]
FIG. 2 is a cross-sectional plan view showing the vicinity of the bass-reinforcement bass reflex
port 4 of the speaker apparatus according to the embodiment of the present invention shown in
FIG. 1 in an enlarged manner.
[0013]
FIG. 3 is a characteristic diagram comparing the sound pressure frequency characteristics of the
speaker device according to an embodiment of the present invention with the characteristics of
the conventional speaker device. In FIG. 3, the characteristic a represents a speaker using a
conventional acoustic tube. The sound pressure frequency characteristic of the device,
characteristic b, is the sound pressure frequency characteristic of the speaker device in one
embodiment of the present invention.
[0014]
In the case of the speaker apparatus of the present invention configured as described above, the
opening 7 of the acoustic tube 2 is formed into an elongated rectangular shape in consideration
of incorporation into the device, and the opening 11 of the bass reflex port 4 for low-frequency
enhancement is Even in the speaker device disposed close to the opening 7 of the acoustic tube 2
to improve the low frequency characteristics, the low frequency region is constructed by using
the sound absorbing material 13 as a part of the wall surface of the low frequency band
enhancement bass reflex port 4. The sound wave emitted from the opening 7 of the acoustic tube
2 is disturbed by the sound wave emitted from the boosting bass reflex port 4, and peak dip is
generated in the mid-high range reproduction band of the sound pressure frequency
characteristic as shown in the characteristic a shown in FIG. It is possible to solve the problem of
the conventional speaker device that has many characteristics.
[0015]
That is, since the sound wave radiated from the low-pass boost bass reflex port 4 is reproduced
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together with the low-pass component as well as the mid-high-pass sound wave, the mid-high
pass component is radiated from the opening 7 of the acoustic tube 2 The cause of the peak dip
generated by being reproduced as a composite waveform in phase and in phase with the low
frequency component is emitted from the low frequency enhancement bass reflex port 4 by the
sound absorbing material 13 provided near the tip of the low frequency enhancement bass reflex
port 4 It is possible to delete the middle and high frequency components to be deleted.
[0016]
As a result, in the case of the speaker device in one embodiment of the present invention, it is
possible to prevent the sound wave radiated from the opening 7 of the acoustic tube 2 from
being disturbed, and as indicated by the characteristic b in FIG. Since the flattening can be
achieved, it is possible to further improve the sound quality.
[0017]
Furthermore, in one embodiment of the present invention, the wall surface on the rectangular
side constituting the acoustic tube 2 and a part of the wall surface constituting the bass reflex
port 4 for low-frequency enhancement are constituted by the same wall surface 12 The
remaining part of the wall surface of the bass reflex port 4 is constituted by using the sound
absorbing material 13, and this sound absorbing material 13 can also function as a standing
wave removing agent generated inside the acoustic pipe 2, which can be realized conventionally.
It has become possible to realize more natural sound reproduction without attenuation of the low
range component reproduced from the low range enhancement bass reflex port 4.
[0018]
In the above embodiment of the present invention, the bass reflex bass reflex port 4 is
constituted by the same wall as the wall of the acoustic pipe 2, but the bass reflex bass reflex
port 4 is arranged close to the acoustic pipe 2 and It goes without saying that the same effect can
be obtained in the case of
[0019]
Furthermore, in the embodiment of the present invention, although the low-pass boost bass
reflex port 4 is disposed on one side of the acoustic pipe 2, the low-pass boost bass reflex port 4
is close to both side surfaces of the acoustic pipe 2. It goes without saying that the same effect
can be obtained even in the case of the arranged configuration.
[0020]
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As described above, according to the present invention, an acoustic tube for guiding a sound
wave having an elongated opening and having a substantially rectangular shape is disposed on
the front surface of the speaker, and A speaker device that enables downsizing of a television
receiver by forming a part of the wall surface of a low-pass intensifying bass reflex port disposed
close to one side or both sides of the wall surface using a sound absorbing material Further high
sound quality can be realized.
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