# US 12,192,723 B2 · Techniques for generating audio signals

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- Number: US 12,192,723 B2
- Document ID: US12192723B2
- Status: Granted
- Kind: B2
- Application number: 18/217,652
- Filed: 2023-07-03
- Published: 2023-11-02
- Granted: 2025-01-07
- Earliest claimed: 2019-12-23
- Assignees: Sonicedge Ltd.
- Applicants: Sonicedge Ltd.
- Inventors: Mordehai Margalit
- Web page: https://patentgrep.com/patent/US12192723B2

## CPC

- H04R 7/08: comprising superposed layers separated by air or other fluid
- H04R 17/00: Piezoelectric transducers; Electrostrictive transducers (piezoelectric or electrostrictive elements in general H10N30/00; details of piezoelectric or electrostrictive motors, generators or positioners {H10N30/00})
- H04R 19/02: Loudspeakers (H04R19/01 takes precedence)
- H04R 2217/03: Parametric transducers where sound is generated or captured by the acoustic demodulation of amplitude modulated ultrasonic waves
- H04R: LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS (producing sounds with frequency not determined by supply frequency G10K)

## Abstract

A speaker array includes a first speaker device having a first membrane and a first acoustic channel, the first membrane being configured to oscillate and generate a first ultrasonic acoustic signal configured to be transmitted at least partially in the first acoustic channel, the first acoustic channel including at least one dimension comparable to a dimension of a viscous boundary layer of air. A second speaker device includes a second membrane and a second acoustic channel, the second membrane being configured to oscillate and generate a second ultrasonic acoustic signal configured to be transmitted at least partially in the second acoustic channel, the second acoustic channel including at least one dimension comparable to the dimension of the viscous boundary layer of air. An audio output of the speaker array is the combined output of at least the first speaker device and the second speaker device.

## Claims

### Claim 1

A speaker array comprising:
a first speaker device comprising a first membrane and a first acoustic channel, the first membrane being configured to oscillate and generate a first ultrasonic acoustic signal configured to be transmitted at least partially in the first acoustic channel, the first acoustic channel including at least one dimension comparable to a dimension of a viscous boundary layer of air such that acoustic flow through the first acoustic channel is nonlinear, and
a second speaker device comprising a second membrane and a second acoustic channel, the second membrane being configured to oscillate and generate a second ultrasonic acoustic signal configured to be transmitted at least partially in the second acoustic channel, the second acoustic channel including at least one dimension comparable to the dimension of the viscous boundary layer of air such that acoustic flow through the second acoustic channel is nonlinear,
wherein an audio output of the speaker array is the combined output of at least the first speaker device and the second speaker device.

### Claim 2 (depends on 1)

The speaker array of claim 1, wherein each of the first and second membranes is comprised of any of the following; metal layers; Aluminum; Silicon; poly Silicon; Silicon Nitride; Nickel; Copper; Ceramic Aluminum Nitride; Molybdenum; Carbon; Graphene; Polymer; PZT; PVDF; or any combination which includes any of these materials.

### Claim 3 (depends on 1)

The speaker array of claim 1, wherein each of the first and second membranes is configured to be actuated by any of the following; electrostatic force;
piezo electric force; electromagnetic force.

### Claim 4 (depends on 1)

The speaker array of claim 1, wherein each of the first and second acoustic channels is comprised of any of the following; Silicon; Silicon Oxide; Polymer; Polyamide; Nickel; Copper; Aluminum; Metal; Ceramic; Glass or any combination which includes any of these materials.