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Noise reducing method and device and earphone

A technology of noise reduction processing and processing unit, which is used in earphone/headphone accessories, headphones to reduce environmental noise, and internal hearing-type headphones, etc. It can solve the problem of unable to retain valuable sound signals in environmental sound signals, and improve user experience. , the effect of ensuring personal safety

Active Publication Date: 2018-11-20
GEER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a noise reduction processing method, device and earphone to solve the problem that the existing earphones cannot retain the valuable sound signal in the environmental sound signal while reducing the noise of the environmental sound signal

Method used

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  • Noise reducing method and device and earphone
  • Noise reducing method and device and earphone
  • Noise reducing method and device and earphone

Examples

Experimental program
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Effect test

Embodiment 1

[0023] figure 1 It is a flow chart of a noise reduction processing method provided by Embodiment 1 of the present invention, such as figure 1 As shown, the noise reduction processing method includes the following steps:

[0024] S110, using a feed-forward microphone to collect an environmental sound signal, and obtaining amplitude information and spectrum information of the environmental sound signal;

[0025] S120. Perform feed-forward noise reduction processing on the environmental sound signal according to the amplitude information of the environmental sound signal; and extract a sound signal of a specified frequency in the environmental sound signal according to the spectrum information of the environmental sound signal;

[0026] As known to those skilled in the art, the speaker of the earphone plays a time-domain signal, and the Fourier transform can convert the time-domain signal into a frequency-domain signal to obtain the spectrum information of the signal. Therefore...

Embodiment 2

[0032] figure 2 It is a flow chart of another noise reduction processing method provided by Embodiment 2 of the present invention, such as figure 2 As shown, the noise reduction processing method includes the following steps:

[0033] S201. Collect an ambient sound signal by using a feed-forward microphone.

[0034] In this step S201, what the feedforward microphone collects is the ambient sound signal outside the earphone. After step S201 is executed, steps S202 and S203 are executed respectively.

[0035] S202. Acquire amplitude information of the ambient sound signal. After this step S202 is executed, execute S204.

[0036] S203. Acquire spectrum information of the ambient sound signal.

[0037] This step S203 mainly uses the Fourier transform technology to obtain the spectrum information of the environmental sound signal collected by the feed-forward microphone. After step S203 is executed, steps S205 and S209 are respectively executed.

[0038] S204, performing e...

Embodiment 3

[0094] image 3 It is a schematic diagram of the functional structure of a noise reduction processing device provided in Embodiment 3 of the present invention, as shown in image 3 As shown, the noise reduction processing device 300 includes:

[0095] The acquisition unit 301 is configured to use the feed-forward microphone 100 to acquire the environmental sound signal, and acquire the amplitude information and spectrum information of the environmental sound signal;

[0096] A feedforward noise reduction processing unit 302, configured to perform feedforward noise reduction processing on the environmental sound signal according to the amplitude information of the environmental sound signal acquired by the acquisition unit 301;

[0097] An extraction unit 303, configured to extract a sound signal of a specified frequency in the environmental sound signal according to the spectrum information of the environmental sound signal acquired by the acquisition unit 301;

[0098] The ...

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PUM

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Abstract

The invention discloses a noise reducing method and device and an earphone. The method comprises that a feedforward microphone collects an ambient sound signal, and amplitude information and spectruminformation of the ambient sound signal are obtained; feedforward noise reduction is carried out on the ambient sound signal according to the amplitude information of the ambient sound signal; a soundsignal in a specific frequency is extracted from the ambient sound signal according to the spectrum information of the ambient sound signal; and the sound signal in the specific frequency is output together with the signal after feedforward noise reduction. Thus, the sound signal of the specific frequency can be monitored.

Description

technical field [0001] The invention relates to the field of sound signal processing, in particular to a noise reduction processing method, device and earphone. Background technique [0002] In the traditional field of noise protection, passive (passive) noise isolation equipment (for example, ear protectors) is mainly used for noise protection, and ear protectors generally choose large-sized protective earmuffs to isolate noise. This large-sized ear protector can effectively isolate external noise (especially high-frequency noise), but at the same time isolate valuable sounds in the external environment, such as alarm sounds with line spectrum characteristics, and voice information from surrounding companions etc., bring inconvenience to the use of the earphone wearer, and even make the earphone wearer be in a dangerous environment. In addition, although passive noise isolation equipment has a good effect of isolating medium and high frequency noise, it is difficult to iso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/16G10K11/175G10L25/18G10L25/48
CPCG10K11/16G10K11/175G10L25/18G10L25/48G10K2210/3056G10K2210/3046G10K2210/3025G10K2210/3027G10K2210/3026G10L21/0208H04R1/1083G10L2021/02085H04R1/1016G10K11/17881G10K2210/1081G10K2210/3012G10L25/21
Inventor 华洋李鹏
Owner GEER TECH CO LTD
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