Sound capturing method, microphone, and electronic device

A microphone, comprising a substrate, a protective cover, a laser self-mixing apparatus, a diaphragm apparatus, and a processor, wherein

• the protective cover and the processor are fastened to the substrate, the protective cover and the substrate form an inner cavity through enclosure, and the laser self-mixing apparatus and the diaphragm apparatus are fastened in the inner cavity and each are communicatively connected to the processor;
• the diaphragm apparatus comprises a membrane and a back cavity, the back cavity is fastened to the substrate, the membrane is located on a side of the back cavity and away from the substrate, and the membrane and the back cavity form a sound pickup cavity through enclosure on the substrate;
• the laser self-mixing apparatus comprises a transmitter and a receiver, the transmitter and the receiver are both accommodated in the sound pickup cavity and fastened to the substrate, the transmitter is configured to emit laser light toward the membrane, and the receiver is configured to receive laser light reflected by the membrane;
• and
• the substrate is further provided with a plurality of sound pickup holes, and the sound pickup cavity communicates with the outside through the plurality of sound pickup holes.

An electronic device, comprising a microphone, wherein the microphone is configured to collect an audio signal, wherein the microphone comprises a substrate, a protective cover, a laser self-mixing apparatus, a diaphragm apparatus, and a processor, wherein

• the protective cover and the processor are fastened to the substrate, the protective cover and the substrate form an inner cavity through enclosure, and the laser self-mixing apparatus and the diaphragm apparatus are fastened in the inner cavity and each are communicatively connected to the processor;
• the diaphragm apparatus comprises a membrane and a back cavity, the back cavity is fastened to the substrate, the membrane is located on a side of the back cavity and away from the substrate, and the membrane and the back cavity form a sound pickup cavity through enclosure on the substrate;
• the laser self-mixing apparatus comprises a transmitter and a receiver, the transmitter and the receiver are accommodated in the sound pickup cavity and fastened to the substrate, the transmitter is configured to emit laser light toward the membrane, and the receiver is configured to receive laser light reflected by the membrane;
• and
• the substrate is further provided with a plurality of sound pickup holes, and the sound pickup cavity communicates with the outside through the plurality of sound pickup holes.