IP Library Granted Patent US 12,347,451
Granted Patent B2
US 12,347,451 · App. 17/938,207 · Granted Jul 1, 2025

Acoustic speaker cover material detection systems and methods

Inventor: Andreas Pehn Sloth (Copenhagen, DK)
Assignee: Bang & Olufsen A/S
G10L25/51H04R1/023H04R3/00H04R29/001H04R2430/00
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Quick Facts
Patent No.
US 12,347,451
App. No.
17/938,207
Granted
Jul 1, 2025
Kind
B2
Abstract

A system for detecting a cover sound profile, the cover sound profile including at least one sound sample produced from sound diffracted by a cover. The system includes a device comprising a housing and at least one speaker driver, at least on microphone, and at least one processor. The device is configured to selectively couple the cover via the housing and produce a sound via the at least one speaker driver. The at least one microphone configured to detect the sound and produce an electrical signal from the detected sound. The at least one processor is configured to receive the electrical signal determine, using machine learning, that the spectrogram meets or surpasses a similarity threshold to the sound cover profile, and change at least one characteristic of the device based on an adjustment operation associated with the determined cover sound profile.

Claims (36)

1. A system for detecting a cover sound profile, the cover sound profile including at least one sound sample produced from sound diffracted by a cover, the system comprising:

a device comprising a housing and at least one speaker driver, the device configured to:

selectively couple the cover via the housing;

produce a sound via the at least one speaker driver;

at least one microphone configured to:

detect the sound; and

produce an electrical signal from the detected sound; and

at least one processor configured to:

receive the electrical signal;

determine, using a machine learning algorithm, that the electric signal meets or surpasses a similarity threshold to the cover sound profile; and

change at least one characteristic of the device based on an adjustment operation associated with the determined cover sound profile.

2. The system of claim 1 , wherein the at least one sound sample is at least one spectrogram and the at least one processor is further configured to, prior to determining, convert the electrical signal to a spectrogram.

3. The system of claim 1 , wherein the at least one microphone is configured to detect the sound only upon receiving a test command.

4. The system of claim 1 , wherein the sound is white noise.

5. The system of claim 1 , wherein the sound is produced at an ultrasonic frequency.

6. The system of claim 1 , wherein the cover is comprised of one or more of wood, fabric, plastic, marble, metal, glass, rubber, and leather.

7. The system of claim 1 , wherein the at least one microphone is a microphone array.

8. The system of claim 1 , wherein the machine learning algorithm incorporates a Fast Fourier Transform.

9. The system of claim 1 , wherein the machine learning algorithm incorporates image recognition.

10. The system of claim 1 , wherein the at least one processor is further configured to update the determined cover sound profile to include the electric signal.

11. The system of claim 1 , wherein the determining is based in part on whether a preceding electric signal from a previous detected sound failed to meet or surpasses the similarity threshold with the cover sound profile.

12. A method for detecting a cover sound profiles, the cover sound profile including at least one sound sample produced from sound diffracted by a cover, the method comprising:

producing, via a speaker driver, a sound;

detecting, via a microphone, the sound;

producing an electrical signal from the detected sound;

transmitting the electrical signal to a processor;

determining, using recognition machine learning algorithm, that the electric signal meets or surpasses a similarity threshold to the cover sound profile; and

changing at least one characteristic of a device based on the control operation mapped to the determined cover sound profile.

13. The method of claim 12 , wherein the at least one sound sample is at least one spectrogram and the method further comprises, converting, at the processor, the received electrical signal to a spectrogram prior to determining.

14. The method of claim 12 , further comprising receiving a test command prior to detecting the sound.

15. The method of claim 12 , wherein the sound is white noise.

16. The method of claim 12 , wherein the sound is produced at an ultrasonic frequency.

17. The method of claim 12 , the cover is comprised of one or more of wood, fabric, plastic, marble, metal, glass, rubber, and leather.

18. The method of claim 12 , wherein the at least one processor is further configured to update the determined cover sound profile to include the electric signal.

19. The method of claim 12 , wherein the machine learning algorithm incorporates image recognition.

20. The method of claim 19 , wherein the determining is based in part on whether a preceding electric signal from a previous detected sound failed to meet or surpasses the similarity threshold with the cover sound profile.

Assignments (2)
CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE DATA PREVIOUSLY RECORDED ON REEL 61826 FRAME 908. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Recorded May 15, 2025
From: SLOTH, ANDREAS PEHN
To: BANG & OLUFSEN A/S
Reel/Frame 071279/0354 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 18, 2022
From: SLOTH, ANDREAS PEHN
To: BANG & OLUFSEN
Reel/Frame 061826/0908 →
Continuity (1)
Related Publication 20240119957A1 · Apr 11, 2024
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