Title:
MEMS MICROPHONE
Document Type and Number:
WIPO Patent Application WO/2023/201811
Kind Code:
A1
Abstract:
The present utility model provides a MEMS microphone, comprising a housing provided with an accommodating space, a sound hole that penetrates through the housing, MEMS microphone chips and an ASIC chip that are accommodated in the accommodating space, and a subtractor. The MEMS microphone chips comprise at least a first MEMS microphone chip and a second MEMS microphone chip, and the frequency response drop-off characteristic of the first MEMS microphone chip is different from the frequency response drop-off characteristic of the second MEMS microphone chip; both output signals of the first MEMS microphone chip and output signals of the second MEMS microphone chip are outputted to the subtracter, and after undergoing subtraction by the subtracter, said signals are outputted to the ASIC chip. Compared with related technologies, the MEMS microphone of the present utility model has good anti-interference performance and good sensitivity.
Inventors:
TAN SIEWSEONG (CN)
CHANG YANGMENG (CN)
CHUA TIONGKEE (SG)
PU JINGXIN (CN)
ZHANG RUI (CN)
CHANG YANGMENG (CN)
CHUA TIONGKEE (SG)
PU JINGXIN (CN)
ZHANG RUI (CN)
Application Number:
PCT/CN2022/093437
Publication Date:
October 26, 2023
Filing Date:
May 18, 2022
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
International Classes:
H04R19/00; H04R1/28; H04R19/04
Foreign References:
| CN217335882U | 2022-08-30 | |||
| US20180302727A1 | 2018-10-18 | |||
| CN105493522A | 2016-04-13 | |||
| CN106105259A | 2016-11-09 | |||
| CN104810024A | 2015-07-29 | |||
| CN104902415A | 2015-09-09 | |||
| JP2009100425A | 2009-05-07 |
Attorney, Agent or Firm:
SHENZHEN JUNXINCHENG INTELLECTUAL PROPERTY FIRM (GENERAL PARTNERSHIP) (CN)
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