长期以来,扩声系统的声反馈问题没有得到根本解决。对此,笔者建议用新的方法加以解决——以自适应滤波器消除反馈声。其根据是: 1.原声与反馈声之间是存在差别的;同时又是相似的。2.两者是线性地叠加的。因此可以用它们的相关特性求出两者的时间差和比例因子。然后用这些参数按预测法合成一组伪反馈声,加入自适应滤波器的参考输入端,使真伪反馈声 For a long time, the acoustic feedback problem of the sound reinforcement system has not been fundamentally solved. In this regard, I propose to use new methods to solve - to eliminate the feedback sound adaptive filter. The basis is: 1. There is a difference between the original sound and the feedback sound; at the same time it is similar. 2. The two are linearly superimposed. So you can use their correlation characteristics to find the time difference between the two and the scale factor. Then use these parameters according to the prediction method to synthesize a set of pseudo-feedback sound, adding adaptive filter reference input, the authentic feedback sound