|
|
|
|
Reducing noise but keep speech - Soundforge or other?
On Fri, 03 Oct 2003 22:23:35 +0100,
wrote:
I have some recordings of people speaking, which are obscured by a
high degree of noise; the recordings being from aircraft, subway
trains (the Tube), general outdoor/street noises. I need to keep the
speech intact as much as possible, while reducing noise; said noise
being generally much louder than the speech.
Is this at all possible? Can an app like Soundforge do it, I see there
is a Noise reduction option with SF? Are there other specialist
(Windows) apps which might work, or any audio editing apps which are
reputable for this application?
AFAIK, Soundforge & the simalar Cooledit have functions to sample the
noise & then subtract that from your programme - works best on
continuous, cyclical noise like hum or airconditioning units etc -
helps if u have a clean section of the noise (1-2 sec) so it can
genetate a noise profile from that & then can strip that from the
programme. Expect artifacts like loss of treble & 'underwater voice'
etc if u try to stretch the function too far- think of low bitstream
RealAudio..
You might also try a passband filter - eg brickwall out everything
except from 400Hz up to 2000Hz -get rid of some of the extraneous that
way..
thanks......
|