reducing audio noise

[Walter Soyka]

Ae’s sound tools are pretty primitive. You’d be much better off using Audition for this:
https://helpx.adobe.com/audition/using/noise-reduction-restoration-effects.html

Walter Soyka
Designer & Mad Scientist at Keen Live [link]
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
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[Filip Stillerska]

+1 on Audition; however if you’re looking for a free alternative I wholeheartedly recommend Audacity, it’s developed by a group of volunteers as open source. It can do 75% of what Audition is capable of, and is almost as good in most aspects.