Audio equipment position selection method based on active noise control system

By systematically acquiring and evaluating multiple candidate error microphone and speaker positions, and combining the frequency response characteristics under static and dynamic conditions, the optimal position is selected. This solves the problem of improper error microphone and speaker position selection in the existing technology and improves the overall noise reduction performance of the active noise control system.

CN120692502APending Publication Date: 2025-09-23ZHIJI AUTOMOTIVE TECH CO LTD
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Patent Information

Application Number
CN202510846537.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-24
Publication Date
2025-09-23

AI Technical Summary

Technical Problem

Existing active noise control systems have problems in the improper selection of error microphone and speaker positions, resulting in inaccurate noise signals and poor noise reduction effects, making it difficult to optimize the noise reduction effects at multiple locations simultaneously.

Method used

By obtaining multiple candidate error microphone and speaker positions, the frequency response characteristics under static and dynamic conditions are analyzed to select the optimal position, including evaluating the frequency response curve, amplitude difference and phase difference, and combining the state amplitude integral value of the transfer function to select the optimal position.

Benefits of technology

It achieves simultaneous optimization of noise reduction effects in multiple locations, improves the overall performance of the active noise control system, and adapts to noise control needs in different working conditions and frequency ranges.

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Abstract

The invention relates to an audio equipment position selection method based on an active noise control system, and relates to the technical field of vehicle noise reduction, and the method comprises the steps: obtaining a plurality of candidate error microphone positions and a plurality of candidate loudspeaker positions; evaluating the positions of the plurality of candidate error microphones, wherein the evaluation comprises analyzing frequency response characteristics under a static working condition and a dynamic working condition; selecting an optimal error microphone position according to the evaluation result; evaluating the plurality of candidate loudspeaker positions, wherein the evaluation comprises calculating a transfer function state amplitude integral value from each candidate loudspeaker position to the optimal error microphone position; and selecting an optimal loudspeaker position according to the integral value of the state amplitude of the transfer function. The noise reduction effect of multiple cabin positions can be optimized at the same time, and the overall noise reduction performance of the vehicle is improved.
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