本文利用描述函数法，重点分析了条件反馈校正对自持振荡的抑制作用。
Using the describing function method, this paper gives emphasis to analyse the conditional feedback correction effect on restrain self-sustaining oscillation.
结果表明，采用IIR滤波器结构的ANC系统，对声学反馈现象确实具有明显的抑制作用。
It is shown that in the ANC system with IIR filter the acoustic feedback effect has been apparently abated.
结果表明，采用IIR滤波器结构的ANC系统，对声学反馈现象确实具有明显的抑制作用。
It is shown that in the ANC system with IIR filter the acoustic feedback effect has been apparently abated.
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