Patent ID: 11917366
Assignee: AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD.
Field: Measurement (Instruments)
Classification: CPC H  A  G | IPC A  G  H

Claim 0:
1. A micro-electro-mechanical system (MEMS) optical microphone, comprising:
a shell including an inner cavity and a sound inlet that communicates the inner cavity with outside;
an MEMS module including a diaphragm suspended in the inner cavity and having a shape symmetrical about a geometric center thereof, wherein when an acoustic pressure is applied to the diaphragm, an aperture is formed on the diaphragm, and a size of the aperture increases or decreases with a magnitude of the acoustic pressure applied to of the diaphragm;
an optoelectronic module including an electromagnetic radiation source and a sensor, wherein the electromagnetic radiation source and the sensor are arranged on opposite sides of the diaphragm, and a light beam emitted by the electromagnetic radiation source passes through the aperture and reaches the sensor; and
an integrated circuit module electrically connected with the optoelectronic module;
a size of the light beam is larger than a maximum size of the aperture; the aperture is provided at the geometric center of the diaphragm; the electromagnetic radiation source is disposed opposite to the aperture along a vibration direction of the diaphragm.