spectral_subtractive
代码说明：
谱减法语音增强，包含基本谱减法，多带谱减法，以及自适应谱减法。(Spectral subtraction speech enhancement, contains the basic spectral subtraction, multi-band spectral subtraction, and adaptive spectral subtraction)
文件列表：
spectral_subtractive
....................\mband.asv,13724,2006-10-09
....................\mband.m,13293,2006-10-09
....................\readme.pdf,6838,2006-10-04
....................\readme.txt,1552,2006-10-04
....................\sp02_train_sn5.wav,56082,2006-07-19
....................\sp04_babble_sn10.wav,33900,2005-07-12
....................\specsub.asv,3886,2006-10-09
....................\specsub.m,3893,2006-10-09
....................\ss_rdc.asv,4849,2006-10-09
....................\ss_rdc.m,4849,2006-10-09
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