Check patentability & draft patents in minutes with Patsnap Eureka AI!

Electret microphone

A technology of electret microphone and back plate, which is applied in the field of microphones, can solve the problems of limited sound pressure, high cost, poor stability, etc., and achieve the goal of solving sound pressure limitation, improving sound quality, improving sensitivity and stability Effect

Pending Publication Date: 2018-06-12
SHENZHEN JANLITA TECH DEV CO LTD
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an electret microphone that can replace the MEMS microphone, aiming to solve the technical problems of limited sound pressure, poor sensitivity and stability, and high cost of the MEMS microphone in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electret microphone
  • Electret microphone
  • Electret microphone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] The technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] Such as figure 1 , figure 2 with image 3 as shown, figure 1 It is a schematic cross-sectional structure diagram of an electret microphone 10 according to an embodiment of the present invention, figure 2 yes figure 1 The schematic diagram of the explosive structure of the middle electret microphone 10, image 3 yes figure 1 The top view of the outer circuit board 600 in the electret microphone 10 shown in .

[0025] The electret microphone 10 includes: a housin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an electret microphone. The electret microphone comprises a housing of which the bottom is provided with a sound entering hole, a vibrating diaphragm component which is installed at the bottom of the housing and is opposite to the sound entering hole, an insulating spacer installed on the vibrating diaphragm component, a back electrode plate installed on the insulating spacer, an outer circuit board installed at the top opening of the housing, and an inner circuit board which is installed in the housing and is positioned on the back electrode plate. The inner circuit board is electrically connected with the back electrode plate and the outer circuit board. The sensitivity and the stability are improved. Electric charge is stored through the back electrode plate, sothe capacity of the vibrating diaphragm component for storing the electric charge does not need to be considered. A diaphragm of the vibrating diaphragm component can be selected from materials with good voice frequency features, and the tone quality effect is improved. An MEMS microphone can be replaced by the electret microphone, and own problems of the MEMS microphone that the sound pressure islimited and the cost is higher are solved.

Description

technical field [0001] The invention relates to the technical field of microphones, in particular to an electret microphone. Background technique [0002] At present, microphones are generally divided into ECM (Electret Microphone) and MEMS (Micro Electro Mechanical System Microphone) according to their structure. MEMS is a microphone based on MEMS technology, which consists of MEMS sound pressure sensor chip, ASIC chip, sound cavity and circuit board. The MEMS sound pressure sensor is a miniature capacitor composed of a silicon diaphragm and a silicon back plate, which can convert sound pressure changes into capacitance changes, and then the ASIC chip converts the capacitance changes into electrical signals to achieve "acoustic-electric" conversion. Due to the limited sound pressure of the MEMS sound pressure sensor chip during use, it cannot be used normally when the input sound pressure is large and blowing air is required; at the same time, due to the size and structure...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04R19/01H04R7/02H04R1/04
CPCH04R1/04H04R7/02H04R19/016
Inventor 韩韶峰周元东丁善辉
Owner SHENZHEN JANLITA TECH DEV CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com