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JPH04165798

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DESCRIPTION JPH04165798
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker device used for video equipment such as a television receiver and a vehicle-mounted
audio device, and a television receiver using the same. According to the method of providing a
horn or an acoustic tube on the front surface of the conventional speaker and guiding the sound
wave generated from the speaker to the opening, a large output sound pressure can be obtained
as compared with the case where the horn or the acoustic tube is not used There are advantages
such as the fact that wrinkles are transmitted in a specific direction, and it is often used
conventionally. The following is a description of a conventional acoustic tube-based device with
reference to the drawings. FIG. 6 is a perspective view of a television receiver configured by
using a speaker apparatus for medium to low frequency reproduction and a speaker for high
frequency reproduction combined using the above-mentioned conventional speaker apparatus
using an acoustic tube. In FIG. 5, 1 is a speaker for medium-to-low range reproduction, 2 is an
acoustic tube attached with the speaker 1 for medium-to-low range reproduction, 3 is a television
cabinet, 4 is a cathode ray tube, 6 is an acoustic tube of the speaker device for medium-to-low
range reproduction An opening, 6 indicates a high frequency reproduction speaker installed at
the upper part of the acoustic tube opening 5. The function of the television receiver constructed
by incorporating the speaker device using the conventional sound tube as described above will
be described below. As shown in FIG. 5, a speaker device in which an acoustic tube 2 for guiding
sound waves is disposed on the front part of the low to mid range reproduction speaker 1 is built
in along a cathode ray tube 4 inside a television receiver, and a television cabinet By making 3
into a structure along the speaker device, it is possible to miniaturize the television receiver.
Further, in general, in the case of the high frequency reproduction speaker 6, it becomes possible
to miniaturize the shape of the speaker, and in addition, the sound is not guided to the opening
by the same method as the medium low frequency reproduction speaker device using the
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acoustic tube 2. In order to remove standing waves generated inside the acoustic tube 2, it is
necessary to properly arrange a sound absorbing material inside the acoustic tube 2, or to
attenuate the high-frequency component. In order to guide the reason, the high frequency
reproduction speaker 6 is installed on the front of the television receiver as a means by which
the television receiver can be made relatively compact because the internal configuration of the
sound tube 2 is complicated etc. Method% system% Problem to be solved by the invention
However, in the above-described conventional configuration, the installation positions of the midlow range reproduction speaker 1 and the high-range reproduction speaker 6 are largely
different. More played The phase difference between the sound wave and the sound wave
reproduced from the high-frequency reproduction speaker 6 occurs in each frequency band, and
when viewed as the sound pressure frequency characteristic of the speaker device as a television
receiver, it is shown in FIG. In addition to becoming a characteristic with a lot of peak dips, the
sound quality was unnatural as a result of trial listening.
Still as shown in FIG. 6, since the high frequency reproduction speaker 6 is disposed on the
upper surface of the low and medium frequency reproduction speaker 1, the sound installation in
the middle and high frequency reproduction band is vertical due to the different speaker
installation. It has problems such as moving, and as a result, the sense of sound localization and
the clarity of sound is poor, and it can not be said that it is sufficiently satisfactory when viewed
as a speaker device for a high-performance television receiver. SUMMARY OF THE INVENTION
The present invention solves the above-mentioned conventional problems, and an object of the
present invention is to provide a speaker device capable of obtaining excellent acoustic
characteristics for improving the sense of sound localization and the clarity of sound. In order to
solve the problem, in order to solve this problem, the speaker device of the present invention
arranges an acoustic tube for guiding a sound wave having a substantially rectangular shape at
the front surface of the mid to low frequency reproduction speaker. A high frequency
reproduction speaker is disposed close to the front of the internal low / low frequency
reproduction speaker, and via a cavity for guiding the sound wave of the low / low frequency
reproduction speaker to both sides of the high frequency reproduction speaker. Sound absorbing
material, and on both sides of the front surface of the high frequency reproduction speaker,
reflectors are provided to constitute a sound conductor for guiding the sound wave radiated from
the high frequency reproduction speaker. It is a composition. With this configuration, even in a
speaker device having a horn or an acoustic tube whose opening is a long narrow rectangular
shape in consideration of incorporation into a device, high frequency reproduction is performed
on the front portion of the mid-to-low range reproduction speaker inside the acoustic tube. By
arranging the speakers for close proximity to each other, the attenuation of the middle to high
frequency components reproduced from the medium to low frequency reproduction speaker is
suppressed, and furthermore, the high frequency components reproduced from the high
frequency reproduction speaker arranged close to each other The sound tube is guided by the
sound guide formed by the reflection plate installed on the front side and both sides of the high-
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frequency reproduction speaker to the vicinity of the opening of the acoustic tube. It is possible
to be guided to the front of the opening of the acoustic tube as an acoustic signal synthesized in a
state close to natural without disturbing the waveform of the high-frequency component inside
(without intermodulation) The sound image localization feeling and which could not be achieved
by the conventional products and allow good acoustic properties with improved speech
intelligibility, therefore, so that the attained is compact and higher sound quality of a television
receiving tube machine. Examples of the present invention will be described below with reference
to the drawings. The same reference numerals as in FIGS. 5 and 6 indicate the same parts. FIG. 1
is a perspective view partially showing the structure of a speaker apparatus mainly composed of
an acoustic pipe portion according to an embodiment of the present invention.
In FIG. 1, reference numeral 1 denotes a mid-to-low range reproducing speaker, and a sound
wave is formed on the front portion of the mid-to-low range reproducing speaker 1 in the form of
a long narrow rectangular opening 5 in consideration of incorporation into equipment An
acoustic tube 2 for guiding the Still further, inside the acoustic tube 2, the high frequency
reproduction speaker 6 is disposed close to the front surface portion of the mid to low frequency
reproduction speaker 1, and furthermore, both sides of the high frequency reproduction speaker
6 are middle A reflector 9 for correcting the acoustic characteristics of the sound wave
reproduced from the middle to low frequency reproduction speaker 1 and a sound absorbing
material 1o are disposed via the cavity 8 for guiding the sound wave of the low frequency
reproduction speaker 1 and still high. Reflectors 11 are disposed on both sides of the front
surface of the range reproduction speaker 6 for guiding the sound wave of the high range
component reproduced by the high range reproduction speaker 6 to the vicinity of the opening 5
of the acoustic tube 2 It has become. FIG. 2 is a cross-sectional view showing the configuration of
the speaker apparatus according to the embodiment of the present invention shown in FIG. In
FIG. 2, reference numeral 12 denotes a magnetic circuit portion of the high frequency
reproduction speaker 6, which is disposed as an acoustic lens of the middle high frequency
reproduction speaker 1 in proximity to the front portion of the medium low frequency
reproduction speaker 1. It is a thing. The acoustic signal reproduced from the speaker device
using the acoustic tube of the present invention configured as described above has a
configuration in which the high frequency reproduction speaker 6 is disposed close to the front
portion of the mid to low frequency reproduction speaker 1 As a result, the attenuation of the
middle to high frequency components reproduced from the medium to low frequency
reproduction speaker 1 is suppressed, and the high frequency components to be reproduced
from the high frequency reproduction speaker 6 closely arranged are the high frequency
reproduction speaker 6 Of the sound tube 2 by the sound wave reproduced from the mid-to-low
range reproduction speaker 1 since the sound guide formed by the reflection plates 11 installed
on both sides of the front part of the It is possible to be guided to the opening 5 @ surface of the
acoustic tube 2 as an acoustic signal synthesized in a state close to natural without disturbing the
waveform of the high-frequency component inside (without intermodulation) And television
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When viewed as the sound pressure frequency characteristics of a speaker device as a channel
receiver, as shown in FIG. 3 at 13, it becomes possible to obtain characteristics with less peak
dip, and two speakers are arranged in proximity. Can solve the problem that the sound moves up
and down in the middle and high frequency reproduction band, and can realize excellent acoustic
characteristics that can improve the sense of sound localization and the clarity of sound that
could not be realized conventionally It is. Incidentally, 16 in FIG. 3 shows the characteristics
when the reflectors 11 are not installed on both sides of the front surface of the high frequency
range reproduction speaker 6.
As is apparent from this characteristic, in the absence of the reflecting plate 11, there is a
characteristic that there are many peak dips in the high frequency reproduction band. Next, a
second embodiment of the present invention will be described below with reference to the
drawings. FIG. 4 is a perspective view showing the configuration of the speaker device according
to the second embodiment of the present invention. In FIG. 4, reference numeral 14 denotes an
acoustic pipe in which the structure of the acoustic pipe in the first embodiment of the present
invention can be integrally formed, and 16 denotes an acoustic pipe after the sound absorbing
material 10 is inserted. It is a sound-absorbing material cover for sealing. As described above, the
sound tube 14 according to the second embodiment of the present invention is configured as a
speaker apparatus capable of being integrally formed including the reflection plates 11 installed
on the front and both sides of the high frequency reproduction speaker 6. Thus, a speaker device
having sufficient strength to the internal resonance of the acoustic tube 14 can be realized,
whereby the distortion of the sound generated by the internal resonance of the acoustic tube 14
can be significantly reduced. Furthermore, since the dimensional accuracy of the acoustic tube
14 can be improved by the integral molding, by incorporating the speaker device of the present
invention into a television receiver, the television receiver can be miniaturized and slimmed
down. It is possible to realize a television receiver which can be easily realized and which has
high reliability, yet, the improvement of the assembling operation of the speaker device and the
significant reduction of the number of assembling steps are realized. There are those that can be
achieved. It is needless to say that the same effect can be obtained even in the case where a rear
surface cabinet, a bass reflex port, etc. are provided in the speaker device constructed by the
structure of the acoustic tube of the present invention. Effects of the Invention As described
above, according to the present invention, the acoustic tube for guiding the sound wave having a
substantially rectangular shape is disposed on the front surface of the medium-low range
reproduction speaker, and the front surface of the medium-low range reproduction speaker
inside this acoustic tube A high frequency reproduction speaker is disposed close to the unit, and
a sound absorbing material is disposed on both sides of the high frequency reproduction speaker
via a cavity for guiding the sound wave of the medium low frequency reproduction speaker. The
middle and low frequency range reproduction is configured by installing the reflection plate that
constitutes the sound conduction for guiding the sound wave radiated from the high frequency
range reproduction speaker on both sides of the front part of the high range reproduction
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speaker Attenuation of the mid-high range component reproduced by the speaker is suppressed,
and furthermore, the high-frequency component reproduced by the high-range reproduction
speaker closely arranged is an acoustic pipe as an acoustic signal synthesized in a state near
natural. Can be led to the front of the opening of the This makes it possible to achieve excellent
sound characteristics that improve the sense of sound localization and the clarity of sound that
can not be realized by the conventional products, and consequently, the television receiver can
be made more compact and sound quality can be improved. .
In addition, since the acoustic tube can be integrally formed, distortion of sound generated due to
internal resonance of the acoustic tube can be significantly reduced, and further, the strength
improvement and size of the opening of the acoustic tube can be obtained. Since the accuracy
can be improved, by incorporating the speaker device of the present invention in a television
receiver, it is possible to easily realize downsizing and slimming of the television receiver, and to
provide a highly reliable television receiver. It is possible to realize the improvement of the
assembling workability of the speaker device and the significant reduction of the number of
assembling steps.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a perspective view partially showing the structure of the speaker device according to a
first embodiment of the present invention, and FIG. 2 is the structure according to the first
embodiment of the present invention shown in FIG. 3 is a sound pressure frequency
characteristic diagram when the speaker apparatus using the acoustic tube of the present
invention is incorporated in a television receiver, and FIG. 4 is a speaker according to the second
embodiment of the present invention FIG. 5 is a perspective view showing the configuration of
the apparatus, and FIG. 5 is a perspective view of a television receiver constructed by using both
a low- and high-frequency reproduction speaker apparatus configured using a conventional
acoustic tube. FIG. 6 is a sound pressure frequency characteristic diagram when the speaker
apparatus using the conventional acoustic tube shown in FIG. 5 is incorporated in a television
receiver.
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