双传声器指向性噪声消除在手机中的应用

介绍了一种手机中使用的指向性双传声器噪声消除系统.系统采用两个灵敏度一致性较好的全指向性传声器,形成锥形指向性拾音波束,只接收120.范围以内的信号,大大减少拾音波束之外的噪声干扰;紧接着使用单通道语音增强算法,可进一步衰减采集到信号中的背景噪声.实验结果表明,该系统在保持了较小的语音失真的前提下,对于各种类型的背景噪...

Dual-microphone Directional Noise Cancellation in Mobile Phone

A dual-microphone directional noise cancellation system in mobile phone is presented.This system uses two omni-directional microphones which have good coherence in sensitivity to form a cone-shape sound collection beam.The beam only collects sound which comes from the range of 120 degrees,so background noise outside the beam is largely suppressed.A speech enhancement algorithm is followed and can further suppress the collected background noise.Experiments show that,with little speech distortion,the system h...