Method for quickly updating feed-forward filter of noise reduction earphone and related assembly thereof

A technology of feed-forward filter and noise-cancelling earphones, which is applied in earpiece/earphone accessories, earphones to reduce environmental noise, and instruments, etc. Get fast results with short update times

Pending Publication Date: 2022-05-13
深圳市三省声学技术服务有限公司
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  • Claims
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Problems solved by technology

[0003] The embodiment of the present invention provides a method for quickly updating the feed-forward filter of the noise-canceling headphone and its related components, aiming at solving the problem that

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  • Method for quickly updating feed-forward filter of noise reduction earphone and related assembly thereof
  • Method for quickly updating feed-forward filter of noise reduction earphone and related assembly thereof
  • Method for quickly updating feed-forward filter of noise reduction earphone and related assembly thereof

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[0023] The technical scheme in the embodiment of the invention will be clearly and completely described below in combination with the attached drawings in the embodiment of the invention. Obviously, the described embodiments are part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in the art without making creative work belong to the protection scope of the invention.

[0024] It should be understood that when used in this specification and the appended claims, the terms "include" and "include" indicate the existence of the described features, whole, steps, operations, elements and / or components, but do not exclude the existence or addition of one or more other features, whole, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terms used in this specification of the invention are only for the purpose...

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Abstract

The invention discloses a method for quickly updating a noise reduction earphone feed-forward filter and a related component thereof, and the method comprises the steps: respectively obtaining a first electric signal and a second electric signal of noise received by a feed-forward microphone and an in-ear microphone, and respectively calculating a complex spectrum of Fourier transform, so as to calculate a transfer function, and obtain a first transfer function; adjusting the gain coefficient or the frequency domain response function of the feed-forward filter and recalculating the transfer function to obtain a second transfer function, and calculating a theoretical optimal filter; and comparing the built-in filters with a theoretical optimal filter, taking the built-in filter closest to the theoretical optimal filter as a preferred filter, and calculating a corresponding gain. According to the method, the transfer function in the corresponding state is obtained by changing the state of the feed-forward filter, so that the theoretical optimal filter is calculated, the optimal filter closest to the theoretical optimal filter is screened out from the built-in filters, the gain is calculated, the updating time of the whole process is short, and the obtaining speed of the optimal filter is high.

Description

technical field [0001] The invention relates to the technical field of noise reduction earphones, in particular to a method for rapidly updating a feedforward filter of a noise reduction earphone and related components. Background technique [0002] In recent years, noise-cancelling headphones have become more and more popular. Most noise-cancelling headphones use fixed filters for filtering. However, due to different users, the requirements for filters will also vary. Fixed filters cannot meet individual needs. demand. For this case, the method of built-in multiple sets of filters is mainly used at present, and LMS, gradient descent or traversal are used for filter selection or gain search according to individual differences. However, built-in multiple sets of filters will also result in a longer update time , it is impossible to quickly obtain the built-in filter closest to the theoretical optimal filter, and the update process is greatly affected by environmental noise, ...

Claims

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Application Information

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IPC IPC(8): H04R1/10G10K11/178
CPCH04R1/1083G10K11/17813G10K11/17854
Inventor 张亚东郑保宾
Owner 深圳市三省声学技术服务有限公司
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