Title:
PIEZOELECTRIC MICROPHONE
Document Type and Number:
WIPO Patent Application WO/2020/140569
Kind Code:
A1
Abstract:
The present invention provides a piezoelectric microphone, comprising a base having a back cavity and a piezoelectric cantilever diaphragm fixed at the base. The piezoelectric cantilever diaphragm comprises a first diaphragm positioned at the center and suspended above the back cavity and a second diaphragm fixed at the base and surrounding the first diaphragm. The second diaphragm comprises a fixed end fixed to a side of the base and a movable end close to a side of the first diaphragm and suspended above the back cavity. The piezoelectric microphone further comprises an extensible and retractable elastic member connecting the first diaphragm and the movable end. The piezoelectric microphone provided by the present invention has better performance in comparison to the related art.
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Inventors:
DUAN LIAN (CN)
ZHANG RUI (CN)
ZHANG RUI (CN)
Application Number:
PCT/CN2019/113283
Publication Date:
July 09, 2020
Filing Date:
October 25, 2019
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
International Classes:
H04R17/02; H04R19/04
Foreign References:
| CN109587613A | 2019-04-05 | |||
| CN104219598A | 2014-12-17 | |||
| CN206302568U | 2017-07-04 | |||
| JP2010057167A | 2010-03-11 |
Attorney, Agent or Firm:
GUANGZHOU YUEXIU JILY PATENT & TRADEMARK LAW OFFICE (CN)
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