Martin, on the subject of the qualitative assessment of fan noise, have you seen this: http://ixbtlabs.com/articles2/cpu/fa...k7-noise2.html
Quite interesting, I think it's much more telling of how a fan 'sounds' rather than verbal description alone. Any chance something like that could be done?
edit - ive tried many voltages, tried decoupling, tried just getting used to it, but I can't handle the GT's. That soft warbling harmonic just gets on my nerves when I'm browsing or working. When the fans are at ~1000 rpm the harmonic tone is ~577 Hz, and by 1300 rpm this falls to ~540 Hz. I find anything in this tonal region very irritating especially with any oscillation. One of the reasons I'd like to see spectral analysis of fan noise - might not be loud but damn can it drive you nuts. I've gone ahead and ordered the noiseblocker M12-S3HS, hopefully they sound real nice by comparison!
I was using this to match the tone: http://onlinetonegenerator.com/
Just move it around until you hear it match the tone of the fans and begin to oscillate with them.
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