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。
2
Based on principals of interference of acoustic waves and simplified digital delay-line, comb filter effect induced by superposition of reflections from steps is presented.