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Best 120mm rad fans - Page 3

post #21 of 26
http://www.dot.state.co.us/environme...datedNov05.pdf

Q: How are noise level changes perceived? A: Studies have shown that changes in noise levels of 3 decibels or less are not normally detectable by the average human ear. An increase of 5 decibels is generally readily noticeable by anyone, and a 10-decibel increase is usually felt to be "twice as loud" as before.

You are probably thinking of a amplifier power in, say, an A/V receiver. Doubling the power to a speaker - say from 50 watts to 100 watts only gives you a 3dB increase in volume.
post #22 of 26
the fans that a friend of mine (rogard from xs) ike to use on his rad's are the silverstone fn 121's. the fm series however is a serious fail, or you could have a dabble with the zalman F3.
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post #23 of 26
Quote:
Originally Posted by TonyL222 View Post
http://www.dot.state.co.us/environme...datedNov05.pdf

Q: How are noise level changes perceived? A: Studies have shown that changes in noise levels of 3 decibels or less are not normally detectable by the average human ear. An increase of 5 decibels is generally readily noticeable by anyone, and a 10-decibel increase is usually felt to be "twice as loud" as before.

You are probably thinking of a amplifier power. Doubling the power to a speaker - say from 50 watts to 100 watts only gives you a 3dB increase in volume.
Not to be a little prick about things, but i did specifically say that an increase of 3 Db equates to a 2x increase in sound intensity. But you're right...
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post #24 of 26
NP. We all help each other - and this stuff can get confusing. I'm still struggling to understand C/W curves
post #25 of 26
Quote:
Originally Posted by OC'ing Noob View Post
doesnt noctua choke when placed on radiators though?
Well, you'd want the Noctua NF-P12 instead of the NF-S12 for putting on a radiator since it offers better CFM and pressure.
 
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post #26 of 26
is there any reviews on the Noctua p12 on rads ... i have them as case fans and they are super, and well it would be nice to find out how good thy are on rads
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