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Audio equipment

A sound device and sound collection technology, applied in the direction of sensors, electrical components, two-channel systems, etc., can solve the problems of difficulty in reducing costs, complicated circuit structure, etc., and achieve the effect of suppressing regenerative vibration.

Inactive Publication Date: 2003-09-17
ALPS ALPINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In addition, the method of using a dedicated electronic circuit has a problem that it is difficult to achieve cost reduction because the circuit structure is very complicated.

Method used

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Experimental program
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Embodiment Construction

[0030] figure 1 is a cross-sectional view showing an acoustic device as Embodiment 1 of the present invention, figure 2 yes figure 1 An enlarged cross-sectional view of the sound collection part of the main part.

[0031] figure 1 The illustrated acoustic device 10 has a frame 11 formed by injection molding from a synthetic resin material or die-casting from an aluminum alloy, zinc alloy, or the like.

[0032] In the illustrated embodiment, the above-mentioned frame 11 is made of a synthetic resin material in a disc shape, has an annular outer ring support portion 11a, and an opening portion 11b having an opening having a large inner diameter is formed in the central portion. A concave lower yoke 12 made of a magnetic material is fitted into the opening 11b. In this embodiment, the supporting body is formed by the above-mentioned frame 11 and the above-mentioned lower yoke 12 . Furthermore, a sound emitting part A and a sound collecting part (microphone) B are provided o...

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PUM

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Abstract

The present invention provides an acoustic device capable of preventing regenerative buzzing. When the device is applied with a sound signal, the sound wave generated on the vibrating plate (16) passes through the first air channel (13a) to the sound collecting part (B), and the sound wave generated under the vibrating plate (16) passes through the above-mentioned The second air channel (13b) passes to the sound collection part (B). Since the sound waves generated above and below the vibrating plate (16) are sound waves with a phase difference of 180 degrees, they cancel each other out on the vibrating membrane (32), so the generation of regenerative chattering can be prevented.

Description

technical field [0001] The present invention relates to an acoustic device in which a microphone and a loudspeaker are integrated, and in particular relates to an audio device capable of improving the sensitivity of the microphone while preventing regenerative buzzing. Background technique [0002] When the microphone and the loudspeaker are installed in a box and made close to each other, it is possible that the sound (vibration) emitted by the loudspeaker is received by the microphone, and then becomes an electrical signal and is played by the loudspeaker. The repetition of the phenomenon that the sound is received by the microphone again causes regenerative buzzing (oscillating state). [0003] Therefore, in conventional communication devices such as portable phones, the distance between the above-mentioned microphone and the speaker is increased as much as possible, so that the microphone cannot receive the sound from the speaker, so as to avoid the above-mentioned regen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R9/06
CPCH04R9/063H04R2209/026
Inventor 樋口真一
Owner ALPS ALPINE CO LTD
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