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Amit
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Isolating sections of human voice from noisy audio

Asked by Amit
on 16 Sep 2015
Latest activity Commented on by Amit
on 16 Sep 2015
Hello there all the DSP experts. As a novice with a problem, I have a humble request for guidance.
I am working with several 15-hour audio samples captured in an industrial environment of the following kind: Noisy background, constant whirring of machines, as if driving in a noisy vehicle, no major repetitive noise, some sudden sharp 'ping' (alarm signals from certain machines), and on top of that infrequent/sporadic human voice.
My main interest lies in hearing out the human communication. Currently, I am spending listening to the entire 15 hours!
I do not intend a perfect solution, just want to save as much time as possible, by trimming the portions where no human voice exists.
Is there any way I can achieve this through Signal Processing?
Thank you very much all.

  1 Comment

Any starting points, if not perfect solutions will be highly appreciated. Thanks.

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1 Answer

Answer by Image Analyst
on 16 Sep 2015
 Accepted Answer

I think you need to use Independent Components Analysis (ICA), also known as Blind Source Separation (BSS) to solve the "Cocktail party problem". I'm not an expert in that so all I can do is to refer you to these links:

  1 Comment

Thanks Image Analyst. While I try this, is there any 'makeshift' approach? My 15 hour samples have typically 10-30 minutes of human voice. Can anything coarser may be done. Thanks again.

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