Help removing general white noise in background

[maryk62761295]

http://https://drive.google.com/open?id=0Bw4DUDt71hHaSldscktRWDc2SVk

I am having trouble successfully using the noise reduction process to remove the white noise in this clip.

This entire clip is about 10s long .... If you listen long enough you will notice that the same words are repeated.

That's because the first time he says it is after me doing the noise reduction process in audition to it twice. The second time is the original file with now tweaks. It seems the only difference between the two is the edited version have a certain hollow or flanged effect to it, and it actually sounds worse.

When I did the noise reduction process. these were most likely my settings:
FFT size: 8192
Spectral decay rate: 45%
dB removed: 15 dB
Noise reduction: 65%

Though I have since experimented with them, but didn't get much better results. Noise reduction is really the only audio cleanup process I am familiar with in Audition. If you can help me make this process work, or point me in the direction of the process that will work, I'd greatly appreciate it! Thanks!

[Bob Howes · Accepted solution]

I'm afraid your link doesn't work for me--I get an error message when I click on it.

However, based on the settings you've used, I can make a suggestion.  Instead of one "big" pass of NR with the Noise Reduction slider set to 65%, try doing several (say 4) passes with the slider set to 10 or 15%.   Start with the FFT size set to 2048, then increase the FFT by one setting between each pass.  You'll need to take an new noise sample for each new FFT setting.  This will increase the amount of reduction you can get at the same time as greatly reducing the undesirable artefacts. 

I'd probably also take the dB Reduction down to around 10dB per pass.

Finally, I tend to use a Spectral Decay Rate of around 65% but this shouldn't make too big a difference.

[maryk62761295]

Thank you! I tried this and it helped some!