Fan Noise

Don't know much of noise cancellation hardware or software (I get the feeling you would need to purchase hardware), but I do know that people have has great success with other methods such as watercooling, rubber grommet mounting their case fans and hard drives, using Coolermaster's hard drive cooler/noise reducer, using quieter fans (Panaflo, Papst), using 60mm to 80mm adapters for their CPU fan/s (larger fans make more of a hum and less of a whine), filtering their case gans, and lining the inside of their cases with acoustic foam.

Software wont stop the noise of fans, as mentioned, quiet fans/hdd's are what is needed, enermax whisper psu's are very quiet, I cant comment on fans as Im watercooled- now THAT is quiet, but of course watercooling isnt everyones cup of tea. I've heard of case deadening material which is attatched to the inside of the case, this is supposed to work well but I haven't tried it myself.



Next time you wave - use all your fingers

Don't know of any software, but what I did was to get the Enermax Ultra-Cool and Manually adjustable fans. The Ultra-Cools get faster as the temperature increases, giving quiet noise in the winter when they are cool, and more power and noise in the summer when it is needed. I use these on the exhaust.
On the intake, I use the manually adjustable ones from Enermax also, these I can regulate from less than a whisper to full force in the summer with a small pot on some wires that go anywhere you want. These are available at Newegg.com
I have just purchased a 92mm adjustable fan for the top of the case, ANTEC 1240 w/Enhance 350w PS. I use a 3" electrical conduit chassis punch for a perfect hole.
Good Luck, Take-Out

"We killed OUR Hitler" - attributed to Paul McCartney (If so, then well done, sir)

The sound inversion thing would work (at least in theory). Offhand, I don't know of any software that would let you go directly from the mic to the speakers in realtime, but it must exist. Whether or not this works will depend on the quality of your mic and speakers (especially mic). You may have to direct the speakers output though. You will want all the noise to be released from the front of the speakers. Any bleedback (noise coming from the back of the speakers) will simply add to the noise coming from the fans and double it instead of nullify it. Simplest solution is to put a box around the speakers, with the opening of the box facing the fans (and the speakers directed that way as well), but really a good quality mic will make the difference in this setup.

You may also have to adjust the output a tad as well. You want the output from the speakers to exactly match the input from the mic. The sound frequency may be adjusted slightly upwards or downwards with the conversion from mic to speakers. You may have to "tune" it a bit.

So what you're looking for is software that allows you to brodcast in realtime, but to modify (or tune) the brodcast a bit.

In theory, if the noise from the fans doesn't vary in tone, pitch or level, you could simply set up a looping output and forget about the mic. That's not very likely though.

What unclemic9 is talking about here is using noise to cancel out noise. Noise travels in waves, just like waves in the ocean. If 2 waves of the same size meet head on they will cancel each other out. If a force is met by an equal and opposite force, the 2 forces will nullify each other. I've seen specialized hardware that does this (It looks like a walkman, except that the speakers are facing outwards instead of twords your head), and airlines were talking about installing systems based on this in order to cancel out the noise of the engines (at least in first class). I've never heard of someone trying it with standard computer equipment though..

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