Compression loaded slit shaped waveguide

Patent metadata

Field	Value
Publication number	US-12262172-B2
Application number	US-202217816752-A
Country	US
Kind code	B2
Filing date	Aug 2, 2022
Priority date	May 19, 2022
Publication date	Mar 25, 2025
Grant date	Mar 25, 2025

Abstract

Disclosed herein are system, apparatus, article of manufacture, method and/or computer program product embodiments, and/or combinations and sub-combinations thereof, for a sound source with an array of slit shaped waveguide exits. An example embodiment of the sound source includes one or more drivers configured to receive an audio signal current and to generate pressurized air. The sound source further includes one or more chambers coupled to the one or more drivers and configured to direct the pressurized air from the one or more drivers. The sound source further includes an array of two or more slit shaped exits coupled to the one or more chambers and configured to receive the pressurized air from the one or more chambers and to emit sound waves. The directivity of the sound waves is controlled.

First claim

What is claimed is:

1. A sound source, comprising:
a driver configured to receive an audio signal current and to generate pressurized air;
a plurality of chambers coupled to the driver and configured to direct the pressurized air from the driver; and
a plurality of arrays of two or more slit shaped exits coupled to the plurality of chambers and configured to receive the pressurized air from the plurality of chambers and to emit sound waves,
wherein a first array of the plurality of arrays of two or more slit shaped exits is coupled to a first chamber of the plurality of chambers and a second array of the plurality of arrays of two or more slit shaped exits is coupled to a second chamber of the plurality of chambers, and
wherein a directivity of the sound waves is controlled based at least on a multimedia content associated with the audio signal current, an environment of the sound source, or a feedback from a user of the sound source.

2. The sound source of claim 1 , wherein the driver comprises a compression driver.

3. The sound source of claim 1 , further comprising:
a second driver; and
a second plurality of chambers coupled to the second driver; and
a second array of two or more slit shaped exits coupled to the second plurality of chambers.

4. The sound source of claim 1 , wherein the first array of the plurality of arrays of two or more slit shaped exits comprises a linear array of two or more slit shaped exits that are arranged in a linear arrangement.

5. The sound source of claim 1 , wherein the first array of the plurality of arrays of two or more slit shaped exits comprises a matrix array of two or more slit shaped exits that are arranged in a square matrix arrangement.

6. The sound source of claim 1 , further comprising:
a second driver configured to receive a second audio signal current and to generate second pressurized air.

7. The sound source of claim 6 , further comprising:
a third chamber coupled to the second driver and configured to direct the second pressurized air from the second driver.

8. The sound source of claim 7 , further comprising:
a plurality of slit shaped exits coupled to the third chamber and configured to receive the second pressurized air from the third chamber and to emit second sound waves.

9. The sound source of claim 1 , wherein each slit shaped exit of the first array of the plurality of arrays of two or more slit shaped exits has a length of about 12 mm and a height of about 1 mm.

10. The sound source of claim 1 , wherein the driver comprises an amplifier configured to control the directivity of the sound waves.

11. The sound source of claim 1 , further comprising a passive filter configured to control the directivity of the sound waves.

12. A display device, comprising:
a sound source, comprising:
a driver configured to receive an audio signal current and to generate pressurized air;
a plurality of chambers coupled to the driver and configured to direct the pressurized air from the driver; and
a plurality of arrays of two or more slit shaped exits coupled to the plurality of chambers and configured to receive the pressurized air from the plurality of chambers and to emit sound waves, wherein a first array of the plurality of arrays of two or more slit shaped exits is coupled to a first chamber of the plurality of chambers and a second array of the plurality of arrays of two or more slit shaped exits is coupled to a second chamber of the plurality of chambers; and

a controller configured to control directivity of the sound waves.

13. The display device of claim 12 , wherein the controller is configured to control the directivity of the sound waves based at least on a multimedia content associated with the audio signal current, an environment of the sound source, or a feedback from a user of the sound source.

14. The display device of claim 12 , wherein the controller comprises a digital filter configured to control the directivity of the sound waves.

15. The display device of claim 14 , wherein the digital filter comprises an amplifier in the driver.

16. The display device of claim 12 , further comprising a passive filter configured to control the directivity of the sound waves.

17. The display device of claim 12 , wherein the driver comprises a compression driver.

18. The display device of claim 12 , wherein the first array of the plurality of arrays of two or more slit shaped exits comprises a linear array of two or more slit shaped exits that are arranged in a linear arrangement.

19. The display device of claim 12 , wherein the first array of the plurality of arrays of two or more slit shaped exits comprises a matrix array of two or more slit shaped exits that are arranged in a square matrix arrangement.

20. A display device, comprising:
a sound source, comprising:
a driver configured to receive an audio signal current and to generate pressurized air;
a plurality of chambers coupled to the driver and configured to direct the pressurized air from the driver; and
a plurality of arrays of two or more slit shaped exits coupled to the plurality of chambers and configured to receive the pressurized air from the plurality of chambers and to emit sound waves,
wherein a first array of the plurality of arrays of two or more slit shaped exits is coupled to a first chamber of the plurality of chambers and a second array of the plurality of arrays of two or more slit shaped exits is coupled to a second chamber of the plurality of chambers, and
wherein the first array of the plurality of arrays of two or more slit shaped exits comprises a matrix array of two or more slit shaped exits that are arranged in a square matrix arrangement; and

a controller configured to control directivity of the sound waves based at least on a multimedia content associated with the audio signal current, an environment of the sound source, or a feedback from a user of the sound source.

Assignees

• Roku Inc

Inventors

• Andersen Kasper

Classifications

• H04R2499/15

  Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops · CPC title

• H04R1/028

  associated with devices performing functions other than acoustics, e.g. electric candles · CPC title

• H04R2203/12

  Beamforming aspects for stereophonic sound reproduction with loudspeaker arrays · CPC title

• H04R1/36

  by using a single aperture of dimensions not greater than the shortest operating wavelength · CPC title

• H04R3/12

  for distributing signals to two or more loudspeakers {(specially adapted for hearing aids H04R25/407)} · CPC title