Sorry if it sounds a little hard, but maybe the simple solution is to
learn to use the microphone better to avoid the environmental noise in
the first place? It's not that difficult, and saves you a lot of
digital work and/or processing artifacts later on.

D.

On 5/27/10 8:47 PM, patrick wrote:

my microphone is not that noisy (for a diy 6$ microphone): http://www.workinprogress.ca/electret-microphone-amplifier/

but the environment is (computer fan for example).