# US 2019/0174222 A1 · Noise reduction method and device for self-adaptively adjusting noise reduction gain, and noise reduction earphone

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- Number: US 2019/0174222 A1
- Document ID: US20190174222A1
- Status: Published application
- Kind: A1
- Application number: 16/304,570
- Filed: 2016-12-20
- Published: 2019-06-06
- Earliest claimed: 2016-05-30
- Assignees: Goertek Inc.
- Applicants: Goertek Inc.
- Inventors: Yupei LUO; Jin ZHANG; Kaizhao LIN
- Web page: https://patentgrep.com/patent/US20190174222A1

## CPC

- H04R 1/1083: {Reduction of ambient noise (active noise reduction per se G10K11/175; protective devices for the ear, e.g. providing acoustic protection A61F11/06)}
- H04R 1/1041: {Mechanical or electronic switches, or control elements (switches in general H01H)}
- H04R 3/005: {for combining the signals of two or more microphones (specially adapted for hearing aids H04R25/407)}
- H04R 2460/01: Hearing devices using active noise cancellation
- 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

The present invention discloses a noise-reduction method and device for self-adaptively adjusting a noise reduction gain, and a noise reduction earphone. The method includes: receiving a voice signal collected by a microphone installed on an earphone receiver as a noise signal; obtaining a current noise level of an external environment according to a current sound intensity of the noise signal; setting a current noise reduction gain value corresponding to a current noise level; and performing a noise reduction processing on the noise signal according to a current noise reduction gain value. The present invention sets a noise reduction gain value corresponding to a current noise level of an external environment according to the current noise level, which enables the noise-reduction earphone to adaptively adjust a noise reduction gain and effectively improves the user experience.

## Claims

### Claim 1

A noise reduction method for self-adaptively adjusting a noise reduction gain, comprising:
receiving a voice signal collected by a microphone installed on an earphone receiver as a noise signal;
obtaining a current noise level of an external environment according to a current sound intensity of the noise signal;
setting a current noise reduction gain value corresponding to the current noise level; and
performing noise reduction processing on the noise signal according to the current noise cancellation gain value.

### Claim 2 (depends on 1)

The method according to claim 1, wherein the obtaining a current noise level of an external environment according to a current sound intensity of the noise signal comprises:
comparing the current sound intensity of the noise signal with a set value reflecting the noise level, to obtain a comparison result; and
obtaining the current noise level of the external environment according to the comparison result.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the method further comprises:
determining, according to the current noise level, whether to perform noise reduction processing or not, if yes, setting the noise reduction gain value corresponding to the current noise level.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the setting a current noise reduction gain corresponding to the current noise level comprises:
searching a comparison table that reflects the relationship between the noise level and the noise reduction gain value, to obtain the noise reduction gain value corresponding to the current noise level; and
setting the current noise reduction gain value to be equal to the obtained noise reduction gain value.

### Claim 5

A noise reduction device for self-adaptively adjusting a noise reduction gain, comprising:
a receiving module, configured to receive a voice signal collected by a microphone installed on an earphone receiver as a noise signal;
a level obtaining module, configured to obtain a current noise level of the external environment according to the sound intensity of the noise signal;
a setting module, configured to set a current noise reduction gain value corresponding to the current noise level; and
a noise reduction processing module, configured to perform noise reduction on the noise signal according to the current noise reduction gain value.

### Claim 6 (depends on 5)

The device according to claim 5, wherein the level obtaining module comprises:
a comparison unit, configured to compare the current sound intensity of the noise signal with a set value reflecting the noise level, to obtain a comparison result; and
an obtaining unit, configured to obtain the current noise level of the external environment according to the comparison result.

### Claim 7 (depends on 5)

The device according to claim 5, wherein the device further comprises:
a determining module, configured to determine, according to the current noise level, whether to perform a noise reduction.

### Claim 8 (depends on 5)

The device according to claim 5, wherein the setting module comprises:
a searching unit, configured to search a comparison table that reflects the relationship between the noise level and the noise reduction gain value, to obtain the noise reduction gain value corresponding to the current noise level; and
a setting unit, configured to set the current noise reduction gain value to be equal to the obtained noise reduction gain value.

### Claim 9

(canceled)

### Claim 10 (depends on 1)

A noise-reduction earphone, comprising a processor and a memory, wherein the memory is configured to store instructions, and the instructions are used to control the processor to operate to execute the method according to claim 1.