US 2026/0032391 A1 · MEMS LOUDSPEAKER

Abstract

The present invention discloses a micro-electromechanical system (MEMS) loudspeaker, which includes a supporting structure, a diaphragm and a barrier plate. The supporting structure includes a supporting body and a sound hole penetrating from one end of the supporting body to the other end. The diaphragm is fixed on an inner circumferential side of the supporting body and located in the sound hole. The diaphragm is configured to vibrate and generate amplitude-modulated ultrasonic waves. The barrier plate is covered and fixed to one end of the supporting body. Due to the distance between the barrier plate and the diaphragm, the amplitude-modulated ultrasonic waves are demodulated to obtain modulated sound waves. Thereby improving the sound wave demodulation efficiency and amplitude of the MEMS loudspeaker and further improving the acoustic performance of the MEMS loudspeaker.

Claims10

Dependent claims

A micro-electromechanical system (MEMS) loudspeaker, comprising:

a supporting structure, wherein the supporting structure comprises a supporting body and a sound hole penetrating from one end of the supporting body to the other end;
a diaphragm, wherein the diaphragm is fixed on an inner circumferential side of the supporting body and located in the sound hole;
the diaphragm is configured to vibrate and generate amplitude-modulated ultrasonic waves;
and
a barrier plate, wherein the barrier plate is covered and fixed to one end of the supporting body;
a distance between the barrier plate and the diaphragm is less than a maximum distance of vibration displacement of the diaphragm in a direction away from the barrier plate;
and due to the distance between the barrier plate and the diaphragm, the amplitude-modulated ultrasonic waves are demodulated to obtain modulated sound waves.

4 more elements

Dependencies are inferred from the claim text.

Mems loudspeaker

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Mems loudspeaker

Life of this patent

Abstract

Claims10