The research content of the thesis is the speech enhancement technique that is used in the acoustic feedback suppresser . firstly , we searched and compared the methods of noise estimation based on vad and updating the noise spectrum continuously , combined them together to make some improvement . secondly , we research on some speech enhance techniques including short time spectrum analysis speech enhance technique and its improvement form , simulated the algorithms and compared them each other 本论文研究语音增强技术在声反馈抑制器中的应用,论文的主要工作包括: 1 .对基于vad ( voiceactivitydetection )的噪声估计方法和连续更新噪声谱的方法进行研究和比较,针对仿真结果分析两种噪声估计的性能,并将两者结合起来,做出改进,用于实际的语音增强系统中。
