Granted Patent B1

US 12,412,558 · App. 18/896,845 · Granted Sep 9, 2025

Inventors: Jemm Yue Liang (Sunnyvale, CA); Hsi-Sheng Chen (Fremont, CA)

Assignee: xMEMS Labs, Inc.

G10K15/04H04R19/005H04R19/02

Abstract

Claims (37)

1. A sound producing device, comprising:

a shutter element, configured to obscure an aperture positioned to receive an amplitude-modulated acoustic wave;

a blind element, wherein the aperture is formed within the blind element; and

an amplitude-modulation means, configured to generate an amplitude-modulated acoustic wave toward the aperture;

wherein the amplitude-modulated acoustic wave is produced according to an input audio signal;

wherein the shutter element or the blind element receives a first control signal;

wherein the first control signal is irrelevant to the input audio signal.

2. The sound producing device of claim 1 ,

wherein the amplitude-modulation means receives a second control signal;

wherein the second control signal is generated according to the input audio signal, such that the amplitude-modulated acoustic wave is produced according to the input audio signal.

3. The sound producing device of claim 1 ,

wherein the shutter element or the blind element is driven by the first control signal, such that a gap between the shutter element and the blind element is compressed-and-expanded at an ultrasonic carrier frequency of the amplitude-modulated acoustic wave.

4. The sound producing device of claim 1 ,

wherein a time-variant function of a gap distance of the gap between the shutter element and the blind element is irrelevant to the input audio signal.

5. The sound producing device of claim 1 ,

wherein the amplitude-modulation means comprises an oscillation element;

wherein the oscillation element produces the amplitude-modulated acoustic wave toward a direction orthogonal to a surface of the oscillation element.

6. The sound producing device of claim 1 ,

wherein the shutter element or the blind element is driven by the first control signal which is irrelevant to the input audio signal.

7. A sound producing method, applied for a sound producing device, the sound producing method comprising:

applying a first control signal on an amplitude-modulation means, such that the amplitude-modulation means produces an amplitude-modulated acoustic wave toward an aperture, wherein the first control signal is generated according to an input audio signal;

applying a second control signal on a shutter element or a blind element, wherein the second control signal is irrelevant to the input audio signal;

wherein the sound producing device comprises the shutter element, the blind element and the amplitude-modulation means;

wherein the aperture is formed within the blind element;

wherein the shutter element obscures the aperture positioned to receive the amplitude-modulated acoustic wave.

8. A sound producing method, applied for a sound producing device, the sound producing method comprising:

an amplitude-modulation means producing an amplitude-modulated acoustic wave toward an aperture; and

a shutter element or a blind element performing a compressed-and-expanded movement;

wherein the sound producing device comprises the shutter element, the blind element and the amplitude-modulation means;

wherein the aperture is formed within the blind element;

wherein the shutter element obscures the aperture positioned to receive the amplitude-modulated acoustic wave;

wherein the shutter element or the blind element receives a control signal;

wherein the control signal is irrelevant to the input audio signal.

9. The sound producing method of claim 8 , comprising:

producing, by the amplitude-modulation means, the amplitude-modulated acoustic wave according to an input audio signal at an ultrasonic frequency; and

the shutter element or the blind element performing the compressed-and-expanded movement at the ultrasonic frequency;

wherein the compressed-and-expanded movement is irrelevant to the input audio signal.

Assignments (1)

Continuity (1)

References Cited (16)