US 12,439,190 B2
MEMS microphone with ingress protection
Aamir Qureshi, Cambridgeshire (GB); Brandon Trainer, Bedfordshire (GB); and Andy Mitham, Hertfordshire (GB)
Assigned to Casella Holdings Limited, (GB)
Appl. No. 17/802,946
Filed by Casella Holdings Limited, Bedfordshire (GB)
PCT Filed Feb. 24, 2021, PCT No. PCT/US2021/019437
§ 371(c)(1), (2) Date Aug. 27, 2022,
PCT Pub. No. WO2021/173688, PCT Pub. Date Sep. 2, 2021.
Claims priority of provisional application 62/982,429, filed on Feb. 27, 2020.
Prior Publication US 2023/0146074 A1, May 11, 2023
Int. Cl. H04R 19/04 (2006.01); H04R 1/08 (2006.01)
CPC H04R 1/086 (2013.01) [H04R 19/04 (2013.01); H04R 2201/003 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A microphone assembly comprising:
a microphone housing defining an acoustic cavity and comprising a sound inlet for transmitting a sound into the acoustic cavity;
a micro-electro-mechanical (MEMS) microphone operatively mounted at least partially within the microphone housing and comprising an aperture acoustically coupled with the acoustic cavity for receiving the sound;
a MEMS microphone support adjustably coupled to the microphone housing for supporting the MEMS microphone within the microphone housing, the MEMS microphone support being movable relative to the acoustic cavity; and
an acoustic vent located between the acoustic cavity and sealingly mounted to the aperture;
wherein the MEMS microphone is separated from a closed end of the microphone housing by a distance, and further comprising a sealing gasket positioned between the closed end and the MEMS microphone.