Scene self-adaptive active noise reduction earphone and scene self-adaptive active noise reduction design method

Abstract

The invention relates to the field of active noise reduction, in particular to a scene self-adaptive active noise reduction earphone and a scene self-adaptive active noise reduction design method. According to the scene self-adaptive active noise reduction earphone and the scene self-adaptive active noise reduction design method, a noise collection and analysis unit, a noise mode library unit anda filter library unit are used for realizing optimal noise reduction under different scene noise. The method comprises the following steps of firstly, collecting and analyzing the ambient noise to obtain corresponding characteristic values; secondly, carrying out matching on a noise signal and a preset noise mode in an environment noise mode library according to the characteristic values, and determining the noise type; and finally, selecting a corresponding filter from a filter bank according to the noise type. According to the method for determining the filter by identifying the noise mode,the corresponding filter can be selected according to the noise mode, and the calculation efficiency is improved; the different filters can be selected according to different noise characteristics, and the optimization of the noise reduction effect can be realized.

Description

technical field [0001] The invention relates to the field of active noise reduction, in particular to a scene adaptive active noise reduction earphone and a scene adaptive active noise reduction design method. Background technique [0002] With the rapid development of economy and technology, active noise reduction technology is becoming more and more mature, and it is concentrated in the application of active noise reduction headphones. Active noise reduction headphones use a combination of passive noise reduction and active noise reduction to eliminate noise. Noise-cancelling headphones use earplugs or earmuffs to isolate the earphone user from external noise, that is, passive noise reduction to eliminate high-frequency noise; use an active noise reduction system to generate a noise-cancellation signal that is equal in amplitude and opposite in phase to the noise signal, that is, active noise reduction. Noise reduction mode, eliminating middle and low frequency noise. Th...

AI Technical Summary

Problems solved by technology

Due to different noise reduction scenarios, the distribution characteristics of noise in each frequency band are different. Therefore, the active noise reduction system corresponding to the same noise reduction parameters cannot achieve the optimal noise reduction effect in each noise reduction scenario.

Invention Patent A Method, System and Headphones for Adaptive Active Noise Reduction (201610008962.0) According to the air leakage of the earmuffs after wearing, the noise reduction mode with good noise reduction effect is selected from the pre-established noise reduction modes for noise reduction, although it is effective Improved the noise reduction effect, but did not solve the problem of deterioration of the noise reduction effect caused by the difference in noise characteristics in different scenes

Invention patent A noise reduction method and device for adaptively adjusting noise reduction gain and noise reduction earphones (201610373999.3) By setting the noise reduction gain value corresponding to the current noise level according to the current noise level of the external environment, the noise reduction earphones can automatically Adapt to adjust the noise reduction gain, this method can optimize the noise reduction effect to a certain extent, but it cannot achieve the optimal noise reduction in different noise reduction scenarios

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