Audio enhancement techniques have been useful both in a commercial setting – where lecturers and other speakers can have a discussion or explanation cleaned – or in situations where audio forensics that could mean the difference between conviction or acquittal.
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While the improved audio quality end does not always come out loud and clear (there is only so much that can be done with the original audio in many cases) the end result is often surprising to read to the point where – if the audio properties of proof – will be allowed in court.
Public speakers often find great benefit from the additional audio when they perform at conferences and seminars. Recording of the seminar are usually sold after the fact for those who can not be present and if the speaker has a future Q & A where guests/audience is not wired for sound and then they hear after the fact only able to hear the speaker side of the discussion.
Audio enhancements can actually improve even these issues so that instead of removing the noise, certain sounds (such as conversations) can be strengthened and improved.
Of course, not all the forensic audio enhancement turns and some audio will be preserved all save for those who are trained to listen – and sometimes not even to them.