While looking at the System Preferences of my new MacBook Pro C2D running Mac OS X 10.4.8 I’ve noticed an option called Ambient Noise Reduction (Sound preferences) to reduce all that noise you don’t want on your recordings or in your audio/video chats.
I couldn’t remember to have seen this option before and checking my old PowerBook G4 (Aluminum) also running OS X 10.4.8 revealed that I was right. It looks like this feature was silently introduced with the latest OS update for Intel Macs. Google just finds two relevant pages out of 25 while I’m writing this and Apple didn’t mention it either. It seems like the Mac web missed this!
Some iChat AV video chats after enabling Ambient Noise Reduction on both MacBook Pros involved (one early 2006 MBP, one C2D) I can say this is a great feature. Without this option the voice was clear but there was also a lot of noise from the MBPs fans and some static to hear. With this option enabled the sound seems to be a bit “softer” but more pleasant to listen to. I can only recommend enabling Ambient Noise Reduction as your chat buddy will thank you.