一种多误差麦克风场分布型主动降噪系统及方法
By using a multi-error microphone field distribution system, the system acquires sound wave signals using multi-error microphones and updates FIR filter coefficients, solving the problems of high computational complexity and poor stability of existing active noise cancellation systems in pipeline environments. This achieves more efficient noise reduction and wider application.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CETHIK GRP
- Filing Date
- 2023-04-11
- Publication Date
- 2026-07-17
AI Technical Summary
Existing active noise cancellation systems are prone to getting stuck in local optima in pipeline environments due to the use of a single error microphone, and the complexity of secondary channel sound wave superposition leads to high computational complexity and unstable noise cancellation effect.
A multi-error microphone field distribution system is adopted. Noise and superimposed sound wave signals are acquired through a reference microphone and several error microphones. The LMS gradient descent algorithm is used to update the FIR filter coefficients and generate noise-reduced waves to achieve active noise reduction.
It improves the stability and noise reduction effect of active noise cancellation systems, simplifies algorithm complexity, reduces hardware costs, and broadens application scenarios.
Smart Images
Figure CN117198259B_ABST