JP3208812B2 - Speaker device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loudspeaker device used for video equipment such as a television receiver and an on-vehicle audio device, and a television receiver using the same.

[0002]

2. Description of the Related Art A method of providing a horn or an acoustic tube in front of a speaker and guiding sound waves generated from the speaker to an opening can obtain a larger output sound pressure than when a horn or an acoustic tube is not used. It has the advantage of transmitting sound in a specific direction, and has been widely used. Hereinafter, a conventional speaker device using an acoustic tube will be described with reference to the drawings.

[0003] FIG. 3 is a perspective view of a television receiver constructed by using a speaker device for reproducing low and middle frequencies and a speaker for reproducing high frequencies, which is constructed using the above-mentioned conventional speaker device using an acoustic tube. Show. In FIG. 3, reference numeral 1 denotes a speaker for reproducing the low-mid band, reference numeral 2 denotes an acoustic tube on which the speaker 1 for reproducing the low-low band is mounted, reference numeral 3 denotes a television cabinet, reference numeral 4 denotes a cathode ray tube, and reference numeral 5 denotes a sound tube 2 of the speaker for reproducing the low-mid band. Reference numeral 6 denotes a high-frequency reproduction speaker installed above the opening 5 of the acoustic tube 2.

[0004] The function of a television receiver having a built-in speaker device using the conventional acoustic tube 2 as described above will be described below. As shown in FIG. 3, a speaker device in which an acoustic tube 2 for guiding a sound wave is disposed in front of a mid-low range reproduction speaker 1 is built in along with a cathode ray tube 4 inside a television receiver. Is adapted to be adapted to the speaker device, thereby making it possible to reduce the size and size of the television receiver.

In general, in the case of the high-frequency reproduction speaker 6, it is possible to reduce the size of the speaker, and in addition, the sound is supplied to the opening in the same manner as the medium-low-frequency reproduction speaker using the acoustic tube 2. In order to guide the acoustic wave, it is necessary to appropriately arrange a sound absorbing material inside the acoustic tube 2 in order to remove a standing wave generated inside the acoustic tube 2, or to attenuate the high frequency component without attenuating high frequency components. The speaker 6 for high frequency reproduction is installed on the front of the television receiver as a means for relatively easily reducing the size of the television receiver because, for example, the internal configuration of the acoustic tube 2 is complicated in order to guide the sound tube 2. Was used.

[0006]

However, in the above-mentioned conventional configuration, since the installation positions of the middle and low frequency reproduction speakers 1 and the high frequency reproduction speakers 6 are greatly different, the reproduction from the medium and low frequency reproduction speakers 1 is performed. A phase difference between the sound wave to be reproduced and the sound wave reproduced from the high-frequency reproduction speaker 6 occurs in each frequency band, and when viewed as a sound pressure frequency characteristic of a speaker device as a television receiver, FIG. As shown in the figure, in addition to the characteristic having many peak dips, the sound quality was uncomfortable as a listening result. Also, as shown in FIG. 3, since the high-frequency reproduction speaker 6 is disposed on the upper surface of the mid-low frequency reproduction speaker 1, the sound is up and down in the mid-high frequency reproduction band due to the different speaker installation. It has problems such as movement, and thus has poor sound image localization feeling and intelligibility, so that it cannot be said that it is sufficiently satisfactory when viewed as a speaker device for a high-performance television receiver.

[0007] The present invention solves the above-mentioned conventional problems, and improves the sound image localization sensation and the clarity of voice, and furthermore, has excellent acoustic characteristics in which the acoustic tube opening 5 is made ultra-slim. It is an object to provide a speaker device that can be obtained.

[0008]

In order to solve this problem, a speaker device according to the present invention comprises an acoustic tube for guiding sound waves having a substantially rectangular opening at the front of a speaker for reproducing low and middle frequencies. the high frequency reproduction speaker closely disposed within the interior of the tube to the front portion of the low-frequency reproduction speaker, a pseudo coaxial structure in which the central axis of the middle low band reproducing speaker of the high-frequency reproducing speaker does not match While configuring so that
Through a cavity on both sides on the back of the speaker for high frequency reproduction
Absorbing sound between reflectors of different lengths and this reflector and the acoustic tube
Materials are arranged .

[0009]

With this configuration, the opening is formed into a long and narrow rectangular shape in consideration of the incorporation into the device, and furthermore, even in a speaker device in which the opening of the sound tube is made ultra-slim, the mid-low range reproduction inside the sound tube is performed. By placing a high-frequency reproduction speaker close to the front of the speaker for pseudo-coaxial structure, the mid-high frequency component reproduced from the low-frequency reproduction speaker and the high frequency component reproduced from the high-frequency reproduction speaker Sound waves are synthesized inside the acoustic tube, and reflectors with different lengths and this reflector
Peak dip by placing sound absorbing material between the acoustic tubes
The sound signal can be guided to the front of the opening of the sound tube as an acoustic signal in a state close to nature without any sound, and an excellent sound image localization feeling and sound intelligibility that could not be achieved with conventional products have been improved. This enables the acoustic characteristics to be achieved, and further enables the ultra-slimness of the size of the opening of the acoustic tube, thereby further reducing the size and the sound quality of the television receiver.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. The same reference numerals as those in FIGS. 3 and 4 indicate the same parts.

FIG. 1 is a perspective view showing a configuration of a loudspeaker device with a partial sectional view mainly showing an acoustic tube portion in an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a mid-low range reproduction speaker. A sound wave having a long and narrow rectangular opening 5 is provided on the front surface of the mid-low range reproduction speaker 1 in consideration of incorporation into equipment. A guiding acoustic tube 2 is arranged.

Inside the acoustic tube 2, a high-frequency reproduction speaker 6 is disposed close to the front of the mid-low frequency reproduction speaker 1, and the center axis A of the high-frequency reproduction speaker 6 and the middle axis A are aligned. The central axis B of the low-frequency reproduction speaker 1 does not match, and reflectors 11 and 12 are installed on both sides of the front part of the high-frequency reproduction speaker 6, and one side of the reflection plate 11 is used for high-frequency reproduction. The other reflector 12 is disposed in close proximity to the speaker 6, and the other reflector 12 transmits the sound wave of the middle and high frequency components radiated from the middle and low frequency speaker 1 to the opening between the high frequency speaker 6 and the reflector 12. It is configured to be arranged via a sound guide 13 that can be guided.

On both sides of the rear side of the high-frequency reproduction speaker 6, a medium-low frequency reproduction speaker 1 is passed through a cavity 8 for guiding a sound wave of a medium-low frequency component. The reflector 9 and the sound absorbing material 10 for correcting the acoustic characteristics of the sound waves to be reproduced are arranged.

The acoustic tube 2 of the present invention configured as described above
A sound signal reproduced from a speaker device using a loudspeaker is quasi-coaxially arranged close to a high-frequency reproduction speaker 6 in front of the mid-low frequency reproduction speaker 1 and radiated from the low-frequency reproduction speaker 1. By providing the sound conductor 13 that can directly guide the sound wave of the middle and high frequency component to the opening 5, the sound wave of the middle and high frequency component reproduced from the speaker for middle and low frequency reproduction 1 and the speaker for high frequency reproduction The high-frequency component sound wave reproduced from the high-frequency reproduction speaker 6 is naturally synthesized inside the acoustic tube, and the reflection plates 11 and 12 provided on both sides of the high-frequency reproduction speaker 6.
Thus, the sound signal can be guided to the front surface of the acoustic tube opening 5 as a sound signal in a state close to nature without being attenuated.

A reflector 9 and a sound absorbing material 1 having different lengths on the left and right sides provided on both rear sides of the high frequency reproduction speaker 6.
0, the sound wave of the middle and low frequency components reproduced from the medium and low frequency reproduction speaker 1 is guided to the acoustic tube opening 5 through the cavity 8, and the reflection plate 9 for correcting the acoustic characteristics and the sound absorption In the state where the material 10 is not present, the characteristic having a large peak dip in the middle and low frequency reproduction band as shown in FIGS. 2 and 15 is obtained. It is possible to make the device.

Accordingly, when viewed as a sound pressure frequency characteristic of a speaker device as a television receiver, FIG.
In addition to the characteristic of having a small peak dip as shown in FIG. 5, the mid-high range reproduction speaker 1 and the high range reproduction speaker 6 are arranged in a pseudo-coaxial structure to provide the mid-high range reproduction. The problem of sound moving up and down in the band can be solved, and excellent sound characteristics with improved sound image localization feeling and sound clarity, which could not be realized in the past, are enabled. In order to realize further slimming, the phenomenon that the sense of sound pressure of the middle and high frequency components is reduced, which has been a major problem, is improved by providing the sound guide 13 on the side of the high frequency reproduction speaker 6 and using the medium low frequency reproduction speaker 1 The center axis B of the high-frequency reproduction speaker 6 and the center axis A of the high-frequency reproduction speaker 6 are shifted to one side by 10 mm to 20 mm, so that it is possible to improve the sound pressure sense in the mid-high frequency reproduction band and to flatten the sound pressure frequency characteristics. Thus, the size of the opening of the acoustic tube can be made ultra-slim, and furthermore, the television receiver can be further downsized and the sound quality can be improved.

It is needless to say that the same effect can be obtained even when a rear cabinet, a bass reflex port, and the like are provided in the speaker device having the structure of the acoustic tube of the present invention.

[0018]

As described above, according to the present invention, an acoustic tube for guiding sound waves having a substantially rectangular opening is arranged in front of a speaker for reproducing low- and mid-range sounds. A high-frequency reproduction speaker is placed close to the front of the
The central axis of the high-frequency reproduction speaker does not coincide with the central axis of the mid-low frequency reproduction speaker, and the pseudo-coaxial structure suppresses the attenuation of the mid-high frequency component reproduced from the low-frequency reproduction speaker. Further, the high-frequency component reproduced from the high-frequency reproduction speaker arranged in close proximity can be guided to the front of the opening of the acoustic tube as an acoustic signal synthesized in a state very close to nature. Yes, it is possible to achieve excellent sound characteristics with improved sound image localization and sound clarity that could not be realized with conventional products, and also to realize ultra-slimness of the opening of the sound tube opening. Thus, the size and the sound quality of the television receiver can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a speaker device according to an embodiment of the present invention in a partial cross section.

FIG. 2 is a sound pressure frequency characteristic diagram when a speaker device using the acoustic tube of the present invention is incorporated in a television receiver.

FIG. 3 is a perspective view of a television receiver configured by using both a low-range reproduction speaker device and a high-range reproduction speaker configured using a conventional acoustic tube.

FIG. 4 is a sound pressure frequency characteristic diagram when a speaker device using a conventional acoustic tube is incorporated in a television receiver.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 speaker for middle and low frequency reproduction 2 acoustic tube 5 opening 6 speaker for high frequency reproduction 8 cavity for guiding sound wave of speaker for medium and low frequency reproduction 9 reflector 10 sound absorbing material 11, 12 reflector 13 medium for low frequency reproduction Sound conduction for guiding sound waves of middle and high frequency components of a speaker 14 Sound pressure frequency characteristic diagram when a speaker device using the acoustic tube of the present invention is built in a television receiver A A central axis of speaker for high frequency reproduction B Medium Central axis of low-frequency reproduction speaker

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04R 1/34 310 H04N 5/64 541 H04R 1/02 102 H04R 1/26

Claims (2)

(57) [Claims] An acoustic tube having an opening for guiding a sound wave having a substantially rectangular shape is arranged in front of a speaker for reproducing low- and mid-range sounds. the speaker closely arranged, in the speaker device and the central axis is consistent with a decoction pseudo coaxial structure of the central axis and the middle low band reproducing speaker of the high-frequency reproducing speaker, scan for the high frequency regeneration
Reflections of different length through cavities on both sides of the back of the peaker
Plate with a sound-absorbing material placed between the plate and this reflector and the acoustic tube.
Car equipment. 2. On both sides of a front part of a high frequency reproduction speaker.
One is close to the high-frequency reproduction speaker, and the other is
Through the sound guide that guides the sound waves of the speakers for high frequency reproduction directly to the opening
The speaker device according to claim 1, wherein the reflection plate is arranged as a reflector.