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Noise reduction parameter determination method and device, and active noise reduction method and device

A technology for parameter determination and noise reduction, applied in active noise control, sound-generating equipment, instruments, etc., can solve the problems of inability to reduce noise, inaccurate calculation of acoustic paths, and complex objective calculation of acoustic paths, so as to improve the effect of active noise reduction, The effect of reducing design cost

Pending Publication Date: 2021-10-22
北京安声浩朗科技有限公司
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Problems solved by technology

[0003] However, the objective calculation of the acoustic path is more complicated, and the acoustic path may also change with the use status of the product, which may easily lead to inaccurate calculation of the acoustic path
The inaccurate calculation of the acoustic path seriously affects the noise reduction effect of the target area and even leads to the failure of noise reduction

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  • Noise reduction parameter determination method and device, and active noise reduction method and device
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  • Noise reduction parameter determination method and device, and active noise reduction method and device

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[0029] The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some, not all, embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0030] figure 1 Shown is a block diagram of an active noise reduction system that determines noise reduction parameters by establishing an acoustic path in the prior art. Such as figure 1 As shown, the error microphone 120 is set close to the target noise reduction area, and is used to collect the error signal e. The error signal e is the noise signal after noise reduction obtained in the target noise reduction area. The calculation module 130 is used to The noise reduction signal y is determin...

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Abstract

The invention provides a noise reduction parameter determination method. The method comprises the following steps: acquiring a noise reduction signal sample output by a loudspeaker and an error signal sample collected by an error microphone; performing fuzzy quantization processing on the error signal sample and the noise reduction signal sample to obtain an error signal sample fuzzy vector and a noise reduction signal sample fuzzy vector; determining a fuzzy control mapping relation between the error signal sample fuzzy vector and the noise reduction signal sample fuzzy vector; and determining a noise reduction parameter based on the error signal sample fuzzy vector, the noise reduction signal sample fuzzy vector and the fuzzy control mapping relation. By combining with fuzzy control, noise reduction parameters can be determined without establishing a mathematical model with an accurate acoustic path, the design cost of the active noise reduction system can be remarkably reduced, based on the characteristics of fuzzy control, the active noise reduction process combined with the fuzzy control has intelligence and high efficiency of processing a nonlinear time-varying process, and the active noise reduction effect is obviously improved.

Description

technical field [0001] The present application relates to the technical field of active noise reduction, in particular to a noise reduction parameter determination method and device thereof, an active noise reduction method and device thereof. Background technique [0002] In recent years, products with active noise cancellation have attracted much attention. The noise reduction parameters of the existing active noise reduction (ANC (Active NoiseCancellation, ANC) controller are designed based on the accurate solution to the acoustic path, that is, the acoustic path is regarded as a "system", and according to the relationship between the input and output acoustic signals The relationship determines the system response. [0003] However, the objective calculation of the acoustic path is more complicated, and the acoustic path may also change with the use status of the product, which may easily lead to inaccurate calculation of the acoustic path. Inaccurate acoustic path cal...

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Application Information

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IPC IPC(8): G10K11/178
CPCG10K11/1785G10K11/17875G10K2210/3026
Inventor 徐银海刘益帆
Owner 北京安声浩朗科技有限公司
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