Directional noise reduction method, system thereof and earphone

A noise reduction system and noise reduction technology, applied in speech analysis, instruments, etc., to achieve the effect of simple method, easy implementation and improved efficiency

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

AI Technical Summary

Problems solved by technology

[0004] In view of the above problems, the present invention proposes a directional noise reduction method, system and earphones to solve the problem of directional elimination of the noise signal of a certain noise source in different noise sources

Method used

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  • Directional noise reduction method, system thereof and earphone
  • Directional noise reduction method, system thereof and earphone
  • Directional noise reduction method, system thereof and earphone

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Experimental program
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Embodiment 1

[0039] Such as figure 1 It shows a flow chart of the steps of the directional noise reduction method provided by the embodiment of the present invention, refer to figure 1 , the directional noise reduction method includes the following steps:

[0040] S100: Obtain a noise signal in a certain direction by using a sound orientation method;

[0041] S200: Eliminate noise signals by using an active noise reduction method.

[0042] The above noise reduction method determines the noise signal to be eliminated through the sound orientation, and uses the active noise reduction method to generate the elimination signal, and uses the noise elimination signal to eliminate the noise signal.

[0043] In one embodiment, the above step S100 includes the following steps:

[0044] S110: Acquire a first sound signal and a second sound signal;

[0045] S120: Based on the first sound signal and the second sound signal, determine a noise signal using a sound intensity method.

[0046] In one ...

Embodiment 2

[0061] Such as figure 2 A schematic structural diagram of a directional noise reduction system provided by an embodiment of the present invention is shown, refer to figure 2 , the directional noise reduction system can be used to implement the directional noise reduction method proposed in Embodiment 1, including: a sound directional module 100 and an active noise reduction module 200, the sound directional module 100 is connected to the active noise reduction module 200; the sound directional module 100 is used for A noise signal in a certain direction is acquired; the active noise reduction module 200 is used to eliminate the noise signal. The noise signal to be eliminated in a certain direction is determined by the sound orientation module 100, and the signal is transmitted to the active noise reduction module, and the active noise reduction module calculates and outputs a noise reduction wave according to the noise signal.

[0062] In one embodiment, continue to refer t...

Embodiment 3

[0068] Such as image 3 A schematic structural diagram of the earphone provided by the embodiment of the present invention is shown, refer to image 3 , the earphone includes the directional noise reduction system proposed in Embodiment 2, and also includes a third sound detection device 300, the third sound detection device 300 is installed in the front cavity of the earphone, near the sound device 220, and is used to detect the sound signal sent by the sound device 220 . Specifically, the third sound detection device 300 is a microphone.

[0069] In one embodiment, continue to refer to image 3 , the sound directional module 100 is placed inside the earphone rear cavity wall. Specifically, the sound directional module 100 can be kept parallel to the rear cavity wall of the earphone and installed on the rear cavity wall. It is necessary to punch a hole in the rear cavity wall where the sound directional module is installed, so that the sound signal can enter the earphone a...

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PUM

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Abstract

The invention provides a directional noise reduction method, a system thereof and an earphone, wherein the directional noise reduction method, the system thereof and the earphone relate to the field of active noise reduction. The directional noise reduction method comprises the steps of by means of a sound direction fixing method, acquiring a noise signal in a certain direction; and by means of anactive noise reduction method, eliminating the noise signal. Compared with the prior art, the directional noise reduction method according to the invention is advantageous in that on the condition ofa plurality of noise sources, the sound signal of a certain noise source is acquired, and noise reduction processing is performed on the sound signal; and on the condition of the plurality of noise sources, directional noise reduction on the noise transmitted from the certain noise source is realized. According to the directional noise reduction method, the noises of the different noise sources can be differentiated according to the directionality of the noise source, so that a user can perform noise elimination according to a personal requirement, thereby reserving useful ambient noise and voices in eliminating noise, improving communication efficiency between the user and outside, and reducing danger caused by ambient sound loss. Furthermore the method realizes easy application.

Description

technical field [0001] The invention relates to the fields of signal processing and active noise reduction, in particular to a directional noise reduction method, system and earphones. Background technique [0002] The active noise reduction technology controls the secondary sound source by designing the filter circuit, so that the secondary sound source emits a noise canceling wave that is equal in amplitude to the noise sound wave and opposite in phase, and the noise canceling wave interferes with the secondary sound wave to achieve noise reduction. of elimination. In the above noise elimination process, the noise signals from different noise sources and other sound signals in the same frequency band as the noise signals are also eliminated. These eliminated noise signals and non-noise signals may contain useful Ambient sound information and voice information, missing these information will cause great inconvenience to the user's communication with the outside world, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0208G10L21/0216
CPCG10L21/0208G10L21/0216
Inventor 虞安波
Owner HUITING ACOUSTICS TECH BEIJING CO LTD
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