摘要
抗噪声源时滞会引起尖峰噪声,影响有源噪声控制效果。为分析和抑制时滞引起的尖峰噪声,对原信号与反向延时信号的叠加信号进行理论分析和频谱分析,得到了叠加信号的幅值和相位的表达式,仿真验证理论分析结果适用于实际有源噪声控制。提出对叠加信号进行公式计算直接控制的抑制尖峰噪声的方法,仿真验证该方法具有较好的降噪效果。
Time delay of anti-noise sources may cause peak noise, which may deteriorate the effect of active noise control. To analyze and suppress the peak noise induced by the time delay, theoretical analysis and spectrum analysis for the signal superposed by primary signal and reverse signal were carried out. The expressions of amplitude and phase of the superposed signal were obtained. It is verified by simulation that the results of theoretical analysis can be effectively used in practical noise control of ANC systems.
出处
《噪声与振动控制》
CSCD
2013年第2期148-151,共4页
Noise and Vibration Control
关键词
声学
有源噪声控制
尖峰噪声
时滞
频谱分析
降噪
acoustics
active noise control
peak noise
simulated delay
spectrum analysis
reduction of noise
