没有任何改变

• Experimental results show that the cascading of the speech enhancer and a hidden markov model ( hmm ) based speech recognizer can significantly improve recognition accuracy in noisy environments without performance degradation for clean speech
  通过3种不同的增强算法用于纯净语音和3种类型带噪语音的实验结果分析比较表明，这一方法对纯净语音的识别精度几乎没有任何改变而大大提高了系统的抗噪声性能。