有声和无声检测对比

检测无声部分并将其衰减.

In[1]:=

a = ExampleData[{"Audio", "NoisyTalk"}, "Audio"]

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使用 AudioIntervals 查找低 RMS 振幅和高频谱平坦度的部分.

In[2]:=

nonVoicedIntervals = AudioIntervals[ a, #RMSAmplitude < .02 && #SpectralFlatness > .0001 &, .1, PartitionGranularity -> {.06, .01}]

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可视化检测到的区间.

In[3]:=

AudioPlot[a, Epilog -> {RGBColor[1, 0, 0, .3], Rectangle[{#[[1]], -1}, {#[[2]], 1}] & /@ nonVoicedIntervals}, ImageSize -> Medium]

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衰减检测到的区间.

In[4]:=

AudioJoin[ Riffle[AudioFade /@ AudioTrim[a, Except@nonVoicedIntervals], 0.3*AudioTrim[a, nonVoicedIntervals]]]

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