JPH1132387A - Speaker system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker system having an excellent acoustic characteristic where a standing wave is easily suppressed for a television receiver. SOLUTION: An acoustic tube 1a whose opening leads a rectangular sound wave is coupled with a front side of a speaker 6, a sound absorbing chamber 2a having a resonance port 4 made of a structure different from the acoustic tube 1a is placed to the acoustic tube 1a and the sound absorbing chamber 2a of various shape and size utilizing a dead space in the inside of a television set is properly placed even when the mount state with the television cabinet is changed. Thus, a standing wave is easily suppressed and the speaker system with an excellent acoustic characteristic where the reproduction frequency characteristic is flat is obtained at a low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker device in which an acoustic tube for guiding sound waves is connected to the front of a speaker used for video equipment such as a television receiver, an automobile, and various audio equipment.

[0002]

2. Description of the Related Art A method in which a horn or an acoustic tube is connected to the front of a speaker and a sound wave generated from the speaker is guided to the opening of the acoustic tube has a larger output sound pressure than when no horn or an acoustic tube is used. It has advantages such as being obtained and 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. FIG. 3 is a conceptual view of the structure of a television receiver incorporating the above-mentioned conventional speaker device. In FIG. 3, 1 is an acoustic tube, 6 is a speaker, 18
Is a television cabinet, 19 is a cathode ray tube, 20 is a back cabinet, and 21 is a sound conduit of the television cabinet 18.

[0004] The operation of a television receiver having a built-in speaker device configured as described above will be described. As shown in FIG. 3, a speaker device in which an acoustic tube 1 that guides a sound wave to a front portion of the speaker 6 is incorporated via a sound tube 21 along a cathode ray tube 19 inside a television receiver,
Further, by making the television cabinet 18 along the speaker device, the size of the television receiver can be reduced.

FIG. 2 is a conceptual diagram showing the structure of the above-mentioned conventional speaker device. In FIG. 2, 1 is a speaker 6
A sound tube for guiding sound waves generated from the sound tube 2 is a sound absorbing room in which a sound absorbing material is appropriately sealed to suppress a standing wave generated in the sound tube 1, 3 is a sealing cover for sealing the sound absorbing room 2, 4 is a standing wave Resonance ports 5 for adjusting the frequency to be suppressed are sound tube openings for generating sound waves guided from the sound tube 1. The operation of the conventional speaker device configured as described above will be described below.

When an input signal is applied to the speaker 6, sound waves are radiated from the opening 5 of the acoustic tube 1 through the inside of the acoustic tube 1. However, since the acoustic impedance is largely changed at the opening 5 of the acoustic tube 1, a part of the sound wave is reflected, returns to the inside, and forms a standing wave. Due to the presence of a wave, the reproduced sound pressure frequency characteristic is extremely disturbed with a large peak dip.

However, the sound absorbing chamber 2 having the resonance port 4 disposed inside the acoustic tube 1 absorbs and suppresses each of the standing waves, thereby producing a flat reproduced sound pressure frequency characteristic. Thus, the sound tube 1 is configured to be elongated and have a shape close to a rectangular shape so that natural sound reproduction can be performed by the opening 5.

[0008]

However, in the above-mentioned conventional configuration, the sound absorbing room 2 provided for suppressing the standing wave generated inside the acoustic tube 1 has a specific television including the sound conduit 21 of the television cabinet 18. It is adjusted so as to suppress a specific standing wave generated by the total length of the acoustic tube when the cabinet 18 is mounted.
When the total length of the acoustic tube including the sound conduit 21 changes, the frequency of the standing wave changes, so that the standing wave cannot be suppressed in the sound absorbing chamber 2 and the reproduction frequency characteristic deteriorates. Invite. Further, in order to flatten the reproduction frequency characteristics, the use of an excessive sound absorbing material and the adjustment of the reproduction frequency characteristics by changing the speaker 6 are inevitable, and there remains a problem in terms of cost.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and aims at reducing the cost by using a common acoustic tube and easily suppressing standing waves, thereby achieving a reproduction characteristic having a flat reproduction frequency characteristic. An object is to provide an excellent speaker device.

[0010]

In order to solve the above-mentioned problems, a speaker device according to the present invention comprises a speaker, an acoustic tube having a rectangular shape coupled to the front surface of the speaker, and a wall of the acoustic tube. A separate sound-absorbing chamber having a surface portion which is attached to the provided side wall opening portion and which serves as a side wall of the sound tube, and which is provided with a separate sound absorbing chamber provided with a port desired for the sound tube, such as a television receiver or the like. It is possible to cope with the change of standing wave very easily and inexpensively, because it can be coped with only by installing the sound absorbing room corresponding to the change of the frequency of the standing wave with the change of the mounting state with the set of the sound tube. .

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a speaker, an acoustic tube having a rectangular opening coupled to a front surface of the speaker, and a side wall provided on a wall of the acoustic tube. It has a surface part which is attached to the opening and serves as a side wall of the sound tube, and is constituted by a separate sound absorbing room provided with a port desired for the sound tube on this surface part. Even if the length of the total sound tube including the sound conduit changes due to the change and the generation frequency of the standing wave changes, the sound tube is shared and various shapes using the dead space inside the TV set, It is possible to easily control standing waves of various frequencies by installing a sound absorbing room of appropriate size, and to easily adjust the desired reproduction frequency characteristics. Adjustment design time Reduction also realized, achieving cost reduction, and reproduction frequency characteristics is one that can achieve a superior speaker device of the acoustic characteristics become flat.

An embodiment of a speaker device according to the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of a speaker device according to an embodiment of the present invention. The same portions as those of a conventional speaker device are denoted by the same reference numerals, and description thereof will be omitted.

According to FIG. 1, reference numeral 1a denotes a partial opening 1 on the side wall.
b, an acoustic tube 2a is provided separately from the acoustic tube 1a, and the acoustic tube 2a is provided in the acoustic room 2a.
A resonance port 4 is provided on a surface 2b to be mounted and adhered to the opening 1b, and the sound absorbing chamber 2a is hermetically closed by a sealing cover 3a. This sound absorbing chamber 2a is connected to the acoustic tube 1a.
In this case, the standing wave can be suppressed in accordance with the characteristics of the sound absorbing chamber 2a.

The operation of the loudspeaker device of the present invention configured as described above will be described below.

First, when an input signal is applied to the speaker 6, the sound wave passes through the inside of the acoustic tube 1a and is radiated from the opening 5a of the acoustic tube 1a. At this time, a standing wave generated inside the sound tube as a whole with the sound tube 1a and the sound conduit of the television cabinet is suppressed in the sound absorbing room 2a having the resonance port 4 sealed by the sealing cover 3a.

Further, even if the length of the total acoustic tube including the sound conduit of the TV cabinet changes due to the change of the mounting state of the TV cabinet and the generation frequency of the standing wave changes, the sound tube 1a is shared. By setting the sound absorbing room 2 to various shapes and sizes using the dead space inside the TV set and arranging the sound absorbing room 2a as different ones, it is possible to cope with standing waves of various frequencies and suppress the sound. It is possible to provide a speaker device which can be easily performed, has a low cost, and has excellent acoustic characteristics in which reproduction frequency characteristics are flat. Further, various reproduction frequency characteristics can be realized not only by flattening the reproduction frequency characteristics but also by adjusting the sound absorbing chamber.

In addition, by incorporating the speaker device of the present invention into a television receiver, it is possible to easily realize a small and slim television receiver, and to provide a high-performance and high-quality television receiver. is there.

Note 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.

[0020]

According to the speaker device of the present invention, the length of the total acoustic tube including the sound conduit of the set due to the change of the mounting state with the set such as the TV cabinet changes, and the frequency of generation of the standing wave changes. Even if you try to share the sound tube,
By appropriately installing and installing sound absorbing chambers of various shapes and sizes using the dead space inside the TV set, it is possible to easily suppress standing waves of various frequencies, and to achieve the desired reproduction frequency characteristics. Adjustment can be easily performed, reduction of sound absorbing material, reduction of design time such as adjustment by a speaker is also realized, cost reduction is achieved, and a speaker device having excellent acoustic characteristics with flat reproduction frequency characteristics is realized. Is what you can do.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a speaker device according to an embodiment of the present invention.

FIG. 2 is a perspective view of a conventional speaker device.

FIG. 3 is a conceptual diagram of the structure of a television receiver having a built-in speaker device using a conventional acoustic tube.

[Explanation of symbols]

 1a Acoustic tube 1b Side wall opening 2a Sound absorbing room 3a Sealing cover 4 Resonance port 6 Speaker

Claims (1)

[Claims] 1. A speaker, an acoustic tube having an opening coupled to a front surface of the speaker and having a rectangular shape, and a surface portion which is attached to a side wall opening provided in a wall of the acoustic tube to be a side wall of the acoustic tube. And a separate sound absorbing chamber provided with a port desired for the acoustic tube on this surface.