Systems and methods for obtaining vibration transfer functions

Patent metadata

Field	Value
Publication number	US-12348929-B2
Application number	US-202217936915-A
Country	US
Kind code	B2
Filing date	Sep 30, 2022
Priority date	Aug 29, 2020
Publication date	Jul 1, 2025
Grant date	Jul 1, 2025

Abstract

The present disclosure provides a method for obtaining a vibration transfer function from a sound generation unit to other positions. The method comprises: generating a first sound and a second sound based on a first test audio signal and a second test audio signal; outputting a first feedback signal after receiving the first sound, the first feedback signal including a signal transmitted from a sound generation unit to a first position through vibration transmission path and air conduction transmission path; outputting a second feedback signal after receiving the second sound, the second feedback signal including a signal transmitted from the sound generation unit to a second position through air conduction transmission path; determining the vibration transfer function from the sound generation unit to the first position based on the first test audio signal, the second test audio signal, the first feedback signal, and the second feedback signal.

First claim

What is claimed is:

1. A method for obtaining a vibration transfer function from a sound generation unit to other positions, wherein the method comprises:
generating, by a test signal generation unit, a first test audio signal and a second test audio signal;
generating, by a sound generation unit, a first sound and a second sound based on the first test audio signal and the second test audio signal, respectively;
outputting, by at least one detector, a first feedback signal after receiving the first sound at a first position, the first feedback signal including a signal transmitted from the sound generation unit to the first position through vibration transmission path and air conduction transmission path;
outputting, by the at least one detector, a second feedback signal after receiving the second sound at a second position, the second feedback signal is a signal transmitted from the sound generation unit to the second position only through air conduction transmission path; and
determining, by a feedback path determination unit, the vibration transfer function from the sound generation unit to the first position based on the first test audio signal, the second test audio signal, the first feedback signal, and the second feedback signal.

2. The method of claim 1 , wherein the first test audio signal or the second test audio signal comprises at least one of a white noise signal, a pure audio signal, a pulse signal, a narrow-band noise, a narrow-band chirp, a modulated audio signal, or a sweep frequency audio signal.

3. The method of claim 1 , wherein the at least one detector comprises an air conduction microphone.

4. The method of claim 1 , wherein the sound generation unit is fixed on a device, the at least one detector is connected with the device at the first position to receive the first sound transmitted through the vibration transmission path and the air conduction transmission path, and the sound generation unit is accommodated in the device.

5. The method of claim 4 , wherein the at least one detector is spaced apart from the device at the second position to receive the second sound transmitted only through the air conduction transmission path, and the second position is close to the first position.

6. The method of claim 1 , wherein the at least one detector comprises a first microphone and a second microphone, the first microphone is located at the first position, and the second microphone is located at the second position.

7. The method of claim 1 , wherein the determining the vibration transfer function from the sound generation unit to the first position based on the first test audio signal, the second test audio signal, the first feedback signal, and the second feedback signal comprises:
determining a first feedback path transfer function from the sound generation unit to the first position based on the first test audio signal and the first feedback signal, the first feedback path transfer function includes an air conduction feedback path transfer function and a vibration transfer function;
determining a second feedback path transfer function from the sound generation unit to the second position based on the second test audio signal and the second feedback signal, the second feedback path transfer function only includes the air conduction feedback path transfer function; and
determining the vibration transfer function from the sound generation unit to the first position by subtracting the second feedback path transfer function from the first feedback path transfer function.

8. The method of claim 7 , wherein the determining the first feedback path transfer function based on the first test audio signal and the first feedback signal comprises:
obtaining a first transformed test audio signal and a first transformed feedback signal by transforming the first test audio signal and the first feedback signal, respectively; and
determining the first feedback path transfer function from the sound generation unit to the first position based on the first transformed test audio signal and the first transformed feedback signal.

9. The method of claim 7 , wherein the determining the second feedback path transfer function based on the second test audio signal and the second feedback signal comprises:
obtaining a second transformed test audio signal and a second transformed feedback signal by transforming the second test audio signal and the second feedback signal, respectively; and
determining the second feedback path transfer function from the sound generation unit to the second position based on the second transformed test audio signal and the second transformed feedback signal.

10. The method of claim 1 , wherein the determining the vibration transfer function from the sound generation unit to the first position based on the first test audio signal, the second test audio signal, the first feedback signal, and the second feedback signal comprises:
determining a vibration feedback signal from the sound generation unit to the first position by subtracting the second feedback signal from the first feedback signal; and
determining the vibration transfer function from the sound generation unit to the first position based on the first test audio signal, the second test audio signal, and the vibration feedback signal.

11. The method of claim 10 , wherein the determining the vibration transfer function from the sound generation unit to the first position based on the first test audio signal, the second test audio signal, and the vibration feedback signal comprises:
obtaining a first transformed test audio signal, a second transformed test audio signal, and a transformed vibration feedback signal by transforming the first test audio signal, the second test audio signal, and the vibration feedback signal, respectively; and
determining the vibration transfer function from the sound generation unit to the first position based on the first transformed test audio signal, the second transformed test audio signal, and the transformed vibration feedback signal.

12. A system for obtaining a vibration transfer function from a sound generation unit to other positions, wherein the system comprises:
a test signal generation unit configured to generate a first test audio signal and a second test audio signal;
at least one detector configured to output a first feedback signal after receiving a first sound at a first position and output a second feedback signal after receiving a second sound at a second position, wherein the first feedback signal includes a signal transmitted from the sound generation unit to the first position through vibration transmission path and air conduction transmission path, the second feedback signal is a signal transmitted from the sound generation unit to the second position only through air conduction transmission path, the first sound is generated by the sound generation unit based on the received first test audio signal, and the second sound is generated by the sound generation unit based on the received second test audio signal; and
a feedback path determination unit configured to determine the vibration transfer function from the sound generation unit to the first position based on the first test audio signal, the second test audio signal, the first feedback signal and the second feedback signal.

13. The system of claim 12 , wherein the sound generation unit is fixed on a device, the at least one detector is connected with the device at the first position to receive the first sound transmitted through the vibration transmission path and the air conduction transmission path, and the sound generation unit is accommodated in the device.

Assignees

• Shenzhen Shokz Co Ltd

Inventors

• Yan Bingyan
• Tang Huifang
• Li Bocheng

Classifications

• H04R2460/13

  Hearing devices using bone conduction transducers · CPC title

• H04R29/00

  Monitoring arrangements; Testing arrangements {(for hearing aids H04R25/30; detection of loudspeaker connection H04R5/04; sound-field adaptation dependent on speaker detection H04S7/308)} · CPC title

• H04R25/30

  Monitoring or testing of hearing aids, e.g. functioning, settings, battery power · CPC title

• H04R3/00

  Circuits for transducers (arrangements for producing a reverberation or echo sound G10K15/08; amplifiers H03F) · CPC title

• H04R25/00

  Electric hearing aids · CPC title