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Microphone

一种麦克风、空间的技术，应用在麦克风领域，能够解决振动膜不能振动、失真等问题

Inactive Publication Date: 2008-01-23
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the sound pressure is above a certain level, there will be a problem that the diaphragm cannot vibrate and distortion will occur.

Method used

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  • Microphone
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 will be described with reference to FIG. 1 .

[0024] As shown in FIG. 1 , the microphone described in the embodiment has: an airtight container 13; a vibrating membrane 11 having a first surface 11a and a second surface 11b vibrating upon receiving sound pressure; and a through hole arranged parallel to the vibrating membrane 11. The back pole plate 12 of 12a; The support portion 15 that keeps the peripheral portion of the vibrating membrane 11 and the back pole plate 12 apart from a certain gap; The electromechanical converter 14 composed of a semiconductor device connected to the back pole plate 12; The electrical signal given by 14 is extracted from the inside of the airtight container 13 to the output terminal 16 for the outside, and a hole 13a is provided on the surface of the airtight container 13 that does not directly face the vibrating membrane 11 .

[0025] Next, the operation of the microphone of the first embodiment will be described.

[0026]...

Embodiment 2

[0031] The microphone of the second embodiment will be described with reference to FIG. 2 .

[0032] The microphone of Example 2 has the same constituent elements as the microphone of Example 1, and is an invention in which hole 13a is provided on a surface of airtight container 13 perpendicular to vibrating membrane 11 having first surface 11a and second surface 11b.

[0033] Next, the operation of the microphone of the second embodiment will be described.

[0034] When the sound pressure is transmitted to the second space 200 not directly facing the vibrating membrane 11 through the hole 13a, the sound pressure is applied to the vibrating membrane 11 through the plurality of through holes 12a provided on the back plate 12, and as a result, the vibrating membrane 11 vibrates, a certain gap between the back plate 12 and the vibrating membrane 11 parallel to it will change, resulting in a change in capacity. Then, the change in capacity is converted into an electrical signal b...

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PUM

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Abstract

A microphone, wherein a diaphragm (11) receiving a sound pressure, a rear pole plate (12) disposed parallel with the diaphragm (11), a support part (15) supporting the diaphragm (11) and the rear pole plate (12) apart a specified distance from each other, and an electromechanical converter (14) connected to the rear pole plate (12) are incorporated in a case (13) and a hole (13a) is provided in the surface of an enclosed container (13) not directly opposed to the diaphragm (11), whereby the original structure of the microphone must hardly be changed, and since a mechanical resistance can be increased by reducing the volume of an enclosed space through the diaphragm (11), the occurrence of strain can be suppressed by lowering the sensitivity thereof to an excessively large sound pressure.

Description

technical field [0001] The present invention relates to a microphone, and relates to microphones used in various electronic devices such as audio equipment and car stereos. Background technique [0002] FIG. 3 is a cross-sectional view showing the structure of a conventional microphone. [0003] A conventional microphone is composed of the following parts: an airtight container 3; a vibrating membrane 1 vibrating under sound pressure; a back plate 2 arranged parallel to the vibrating membrane 1 with a certain gap and having a through hole 2a; Open a certain gap to keep the supporting part 5 of the peripheral part of the vibrating membrane 1 and the back pole plate 2; be connected to the electromechanical converter 4 on the back pole plate 2; An output terminal 6 for leading out the inside to the outside; a hole 3 a provided on the surface of the airtight container 3 directly facing the vibrating membrane 1 . [0004] Next, its operation will be described using FIG. 3 . ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R19/04H04R17/02
CPCH04R19/04
Inventor 长谷川昭典
Owner PANASONIC CORP