Title:
MICROPHONE
Document Type and Number:
WIPO Patent Application WO/2023/201828
Kind Code:
A1
Abstract:
The present utility model provides a microphone, comprising a protection structure provided with an accommodating space, and an ASIC chip and a MEMS microphone chip accommodated in the accommodating space. The microphone further comprises a low-pass filter circuit. The low-pass filter circuit is connected between the ASIC chip and the MEMS microphone chip, or the low-pass filter circuit is integrated in the ASIC chip, and the high cut-off frequency of the low-pass filter circuit is greater than 20 KHz. Therefore, by providing the low-pass filter circuit, ultrasonic band interference can be filtered out, noise can be reduced, and the audio quality can be improved.
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/CN2022/094172
Publication Date:
October 26, 2023
Filing Date:
May 20, 2022
Export Citation:
Assignee:
AAC ACOUSTIC TECH SHENZHEN CO LTD (CN)
International Classes:
H04R3/06; H04R19/00; H04R19/04
Foreign References:
| CN106658303A | 2017-05-10 | |||
| CN203368756U | 2013-12-25 | |||
| CN215647354U | 2022-01-25 | |||
| CN112573475A | 2021-03-30 | |||
| US11290810B1 | 2022-03-29 |
Attorney, Agent or Firm:
SHENZHEN JUNXINCHENG INTELLECTUAL PROPERTY FIRM (GENERAL PARTNERSHIP) (CN)
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