利用DSP实现有源降噪功能的传声器设计

The design of active noise reduction function microphone based on DSP

有源降噪传声器是一款利用高度集成的DSP/SOC(片上集成系统)语音处理器设计的语音降噪电声器件。该器件采用了语音环境噪声抑制技术,主要应用于移动电话、电话及电台手柄、头戴耳麦及免提耳麦等装置。利用双传声器信号接收方式,通过DSP语音处理器先进的语音清晰算法,可以有效识别动态环境噪音,从而在输出的正常语音中滤除上述的环境噪音,这样便可以保证通话的对方收听到清晰话音。

Active noise canceling microphone is using a highly integrated DSP/SOC （on-chip system integration） speech processor design for noise reduction in speech acoustic devices.The device adopts the speech noise suppression technology, mainly used in mobile phone, telephone and radio handle, wearing headsets and hands-free headset etc. device. Using double microphone signal receiver, through the clear voice DSP processor, is an advanced algorithm can effectively identify the dynamic environment noise, and in a normal voice output fihering the ambient noise, so that it is guaranteed to call each other to listen to the clear voice.