清音的 meaning in English

atonic
surd

According to the different characteristics between signal and noise on wavelet transform domain , also considering the voiced and unvoiced speech has different features , a modified method of speech denoising which is using a changing threshold at different scales is proposed
摘要分析了信号和噪声在小波域的不同特征表现，并根据语音中浊音和清音的特点，提出了一种改进的多尺度多阈值的小波域语音去噪方法。