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A multi-tone active noise control system with a simplified local on-line secondary-path modeling
Han Wang1, Hongling Sun1, Yunping Sun1
1Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Sciences, No. 21 North 4th Ring Road West, Beijing 100190, China wanghan@mail.ioa.ac.cn, hlsun@mail.ioa.ac.cn, 15996232309@126.com, mingwu@mail.ioa.ac.cn, jyang@mail.ioa.ac.cn, lxd@mail.ioa.ac.cn.
The Journal of the Acoustical Society of America
|January 3, 2019
Summary
This study presents a new online modeling method for multi-tone active noise control (ANC) systems with changing environments. The approach effectively reduces tonal noise even when the system
Area of Science:
- Acoustics and Signal Processing
- Control Systems Engineering
Background:
- Multi-tone active noise control (ANC) is effective for low-frequency tonal noise.
- ANC systems require accurate secondary path modeling, especially with time-varying characteristics.
Purpose of the Study:
- To develop a simplified, on-line secondary path modeling method for multi-tone ANC systems.
- To improve the performance of ANC systems operating in dynamic environments.
Main Methods:
- Introduced a simplified local on-line secondary path modeling approach.
- Utilized a two-tone signal added to noise tones for local modeling.
- Employed the least mean square (LMS) algorithm for adaptive tracking.
- Used notch and bandpass filters to separate signal components.
Main Results:
- The proposed method effectively models time-varying secondary paths.
- Simulations and experiments demonstrated good performance of the multi-tone ANC system.
- The algorithm successfully tracked changes in the secondary path.
Conclusions:
- The presented simplified on-line modeling method is suitable for multi-tone ANC systems.
- This technique enhances ANC performance in scenarios with time-varying secondary paths.
- The approach offers a practical solution for real-world ANC applications.
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