基于混合AFC算法对于声反馈抑制的研究与实现  

Acoustic Feedback Control Based on Hybird AFC Methods

作　　者：未建英[1] 李双田[1] 

机构地区：[1]中国科学院声学研究所,北京100190

出　　处：《电声技术》2013年第9期48-51,55,共5页Audio Engineering

摘　　要：在提高扩声系统增益时,面对的最头疼的问题就是声反馈问题。目前人们普遍认为自适应声反馈抵消方法(AFC)是解决声学反馈控制问题最有前景的方法之一。研究表明,混合的AFC算法比传统的AFC算法在系统稳健性上表现得更好。将最近提出的PEM_AFROW算法与变调不变速方法相结合对于单通道扩声系统中声反馈问题进行了研究和语音仿真实现。When improving the performance of PA systems, a troublesome problem is acoustic feedback. From the current consensus, the adaptive acoustic feedback cancellation（ AFC ）is the most promising methods to solve this problem. Studies have shown that the hybird AFC algorithms perform better than the traditional AFC algorithm in the system soundness. One of the most performing method for AFC is the PEM_AFROW approach. In this paper, an mixed method is proposed combined PEM_AFROW with pitch scaling method used for solving the acoustic feedback problem in the single - channel PA system. Results obtained by computer simulations confirm the effectiveness of the idea.

关 键 词：扩声系统 声反馈 PEM—AFROW 变调 

分 类 号：TN912[电子电信—通信与信息系统]