And in perceptual weighting stage, auditory masking effect is used. A perceptual weighting filter is designed to filter the enhanced speech by spectral subtraction so as to remove residual noise.

在感知加权处理中充分利用了人耳的掩蔽效应，设计了感知加权滤波器，对谱减法增强后的语音进行滤波，进一步消除残余噪声。

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Texas Instruments will manufacture the device, which will use the Lucent Enhanced Perceptual Audio Coder (EPAC) and e.

CNN: Lucent's digital music player to challenge MP3