Distributed active noise control method, system and device and storage medium

A kind of active noise control and distributed technology, applied in the direction of active noise control, sound equipment, instruments, etc., can solve problems such as fault sensitivity, low practicability, network paralysis, etc., to achieve high robustness, strong scalability, noise precise control

Pending Publication Date: 2021-03-09
声耕智能科技(西安)研究院有限公司
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Problems solved by technology

However, the incremental strategy is very sensitive to node and link failures, once a problem occurs, it may lead to the paralysis of the entire network, which is not very practical
In addition, this method is based on the multiple error filtering-xLMS (MEFxLMS) algorithm in the time domain, which is suitable for noise elimination at multiple observation points, and cannot achieve noise reduction in continuous spatial regions

Method used

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  • Distributed active noise control method, system and device and storage medium
  • Distributed active noise control method, system and device and storage medium
  • Distributed active noise control method, system and device and storage medium

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Embodiment 1

[0071] A distributed active noise control method based on a diffusion strategy disclosed in the present invention includes the following steps:

[0072] Step 1, define the wave domain ANC network model, which is a distributed network connected by a certain topology;

[0073] The specific operation of step 1 is:

[0074] 1.1) If figure 1 As shown, define a radius R 1 The circular area of ​​=0.5m is the control area where noise elimination needs to be performed, and the noise source is a 2D point sound source outside the control area (2,0°), with a frequency of 500Hz and an amplitude of 15;

[0075] 1.2) Place N=11 microphone arrays evenly on the boundary of the control area to capture the residual sound field, and at the same time place N=11 loudspeakers uniformly outside the control area with a radius of R 2 = 1.5m on the ring to generate the secondary sound field;

[0076] 1.3) If figure 2 As shown, a distributed network of N=11 nodes is established, each node contains ...

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Abstract

The invention discloses a distributed active noise control method, system and device and a storage medium, and belongs to the field of adaptive signal processing. The method comprises the following steps: firstly, establishing a wave domain active noise control distributed network model by using a wireless acoustic sensor network theory; then splitting a global cost function of the wave domain ANCproblem into a form of a local cost function sum, establishing a distributed optimization problem, and finally, estimating a loudspeaker driving signal only by carrying out local information processing and updating by utilizing a diffusion LMS algorithm. According to the method, the distributed wave domain ANC algorithm is obtained by utilizing a diffusion strategy, so that the calculation burdenis dispersed among the nodes, and compared with a centralized scheme, the method has the advantages that the expansibility and robustness of a wave domain ANC system are higher, and the method is more suitable for large-scale application occasions. According to the method, the blank of distributed optimization in space active noise control application is filled.

Description

technical field [0001] The invention belongs to the field of adaptive signal processing, and relates to a distributed active noise control method, system, equipment and storage medium. Background technique [0002] Active Noise Control (ANC) is based on Young's acoustic wave interference principle, by generating a secondary sound source with equal amplitude and opposite phase to the primary sound source to form a noise-absorbing "quiet zone" in a certain area to achieve the purpose of noise reduction . In recent years, the realization of active noise control in large controlled areas has attracted much attention of researchers because of its great application potential in the aircraft and automotive industries. Since a single-channel ANC system cannot effectively implement noise cancellation in a complex sound field environment, multi-channel ANC systems are usually used for noise cancellation in a spatial region. In addition, since most of the noise field is unknown and v...

Claims

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Application Information

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IPC IPC(8): G10K11/178
CPCG10K11/1785G10K11/17833G10K2210/3035
Inventor 董雨晨陈捷张雯李文申
Owner 声耕智能科技(西安)研究院有限公司
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