1、Acoustic Echo Cancellation (AEC) 回聲消除
https://blog.csdn.net/ljl86400/article/details/80475781
2、Noise Suppression (NS) 噪聲抑制
http://bbs.eeworld.com.cn/thread-605298-1-1.html
3、Noise Gate(NG )噪聲門
https://blog.csdn.net/baidu_25582051/article/details/45940591
4、Automatic Gain Control (AGC)自動增益控制
https://blog.csdn.net/wordwarwordwar/article/details/79539098
5、compressor and expander
6、EQ 均衡器