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Unidirectional electret microphone

A technology of electret microphones and back electrodes, which is applied in the field of microphones and can solve problems such as product performance needs to be improved, sensitivity limitation, and signal-to-noise ratio are not high

Active Publication Date: 2013-02-06
SHENZHEN HORN AUDIO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the sensitivity of the traditional unidirectional electret microphone is limited by the parasitic capacitance, the signal-to-noise ratio is not high, and the performance of the product needs to be improved

Method used

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  • Unidirectional electret microphone

Examples

Experimental program
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Embodiment Construction

[0021] In order to solve the problem that the sensitivity of the traditional unidirectional electret microphone is limited by parasitic capacitance, the signal-to-noise ratio is not high, and the performance of the product needs to be improved, this embodiment provides a unidirectional electret microphone with higher performance. The unidirectional electret microphone will be specifically described below in combination with specific embodiments.

[0022] Please refer to figure 2 with image 3 , the unidirectional electret microphone 100 provided in this embodiment includes a metal shell 110, a diaphragm assembly 120, an insulating gasket 130, a back electrode 140, a circuit board assembly 150, a shrapnel 160, a damping cloth 170, a copper ring 180 and a cavity Body 190.

[0023] The metal casing 110 is specifically a cylindrical structure with one end open, and a first sound inlet hole 112 is opened at the bottom thereof. The dustproof cloth 114 covers the bottom of the me...

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Abstract

The invention relates to a unidirectional electret microphone. The unidirectional electret microphone comprises a metal housing, a membrane assembly, an insulating spacer, a back electrode and a circuit board assembly, wherein the membrane assembly, the insulating spacer, the back electrode and the circuit board assembly are sequentially arranged and packaged in the metal housing, and the membrane assembly comprises a metal membrane ring; and the unidirectional electret microphone is characterized in that a gap is formed in the edge of the back electrode, elastic sheets are arranged between the back electrode and the circuit board assembly, the back electrode and the circuit board assembly are electrically connected by the elastic sheets, and the circuit board assembly comprises a circuit board and is provided with an input electrode electrically connected with the elastic sheets. Compared with the conventional unidirectional electret microphone, the above-mentioned unidirectional electret microphone can effectively restrain the parasitic capacitance, improve the signal to noise ratio and further improve the product performance.

Description

technical field [0001] The invention relates to the field of microphones, in particular to a unidirectional electret microphone. Background technique [0002] As electronic products such as conference systems, notebooks, headphones, and interactive game devices have higher and higher requirements for sound pickup performance, the performance of unidirectional electret microphones has been continuously improved and developed rapidly. [0003] The traditional unidirectional electret microphone generally mainly includes a cylindrical metal casing and a diaphragm assembly, an insulating gasket, a back electrode, a copper ring, and a circuit board assembly arranged in sequence in the metal casing. The insulating gasket connects the back electrode and the membrane. The chip components are separated, and the back electrode is electrically connected to the circuit board component through a copper ring. For the unidirectional electret microphone with this structure, there will be pa...

Claims

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Application Information

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IPC IPC(8): H04R19/01
Inventor 温志锋徐耀光巫志光
Owner SHENZHEN HORN AUDIO
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