|
|
|
|
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?
thanks......
The Sonic Foundry Noise Reduction plug-in for Sound Forge *can* do a
pretty amazing job of eliminating background noise but it depends on
the type of noise. In particular, the technique that SF uses assumes:
1) You have a section of recording (usually in the same piece of
material you're trying to clean up, but not always) that consists of
no other sounds other than the noise you want to remove. For
instance, when recording speech, there is often "silence" before or
after the spoken text that contains nothing but the noise you're
trying to remove.
2) The noise to be removed is constant (at least in its frequency
components and preferably also in its magnitude) across the entire
section of material to be cleaned up. This is often true with things
like air conditioner hiss for instance. It seems like the drone of a
jet engine from inside the cabin is also a good candidate for the type
of noise that can be reduced using the Sound Forge technique. I don't
think it would fare so well against subway noise or street/traffic
noise since it is not constant.
Good luck!
Charlie Hubbard
|