采用随机相位技术的啸叫抑制方法

Phase Randomized Technique for Howling Control

对于扩声系统,如果其音量开得过大,会遇到声音反馈引起的啸叫问题。目前大多数啸叫抑制方法会对语音音质产生影响。提出采用基于时变全通滤波器的随机相位技术对输入信号的相位进行处理。由于人耳对声音相位不敏感,采用该方法对语音音质的影响较小。实验结果表明,该方法可有效抑制啸叫,同时对语音质量也不产生明显影响。

Most howling control techniques may bring on the distortion of the desired signal. A howling control technique based on time-varying all-pass filtering of the desired signal is developed. The phase of the desired signal is changed only in the proposed method, so it has little influence on the audio quality.