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12-Way 120mm Fan Roundup
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Old 31st March 2006, 19:59   #11
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the noise level is different because they took into account the frequency

the temperatures could be inside the margin of error, however as said, their test setup is inferior because it shows less differences between the fans
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Old 31st March 2006, 20:06   #12
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well it just food for thought; my roundup was far from perfect and this one gives a second opinion which can never hurt
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Old 31st March 2006, 20:16   #13
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it's already a lot better than most reviews on the net considering they at least tested noise and performance, explained their methods and gave some usefull information


now you need a sone meter to get full scientific pwnage (it's measures how an average person percieves the noise)


if you measure the dba, the accelero doesn't pwn the stock ATI cooler as hard as with sone because the fact the dba meter doesn't care if it's a broad humming or a high pitched whine annyos
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Old 31st March 2006, 20:23   #14
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where does one get a SONE meter
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Old 31st March 2006, 20:26   #15
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The Loudness Scale and the Sone
As the apparent loudness of a sound is not directly proportional to the sounds loudness level (a doubling of subjective loudness results in an average increase of about 6 phons), subjective experiments have been performed in order to establish a scale on which a doubling of the number of loudness units doubles the subjective loudness, a trebling of loudness units trebles the subjective loudness, and so on.

The unit of this scale is the sone. It is defined as the loudness of a 1000Hz tone having an intensity of 40dB. Thus the sone is equal to the loudness of any sound having a loudness of 40 phons. The mathematical relationship between the two is given as;

S = 2 (P - 40)/10

or log(S) = 0.0301 (P - 40)

where P represents the loudness level in phons, and S the loudness in sones.

http://www.kemt.fei.tuke.sk/Predmety...s/index-1.html
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Old 31st March 2006, 20:29   #16
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I would guess nowadays you get sound meters that calculate everything for you already =O. But then, I could be wrong.
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Old 31st March 2006, 20:32   #17
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that website is very informational http://www.kemt.fei.tuke.sk/Predmety...acoustics.html
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Old 31st March 2006, 21:05   #18
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Sone is all marketing b/s.

http://www.phys.unsw.edu.au/~jw/dB.html#log
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Old 31st March 2006, 21:10   #19
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If you start hearing things when there is hardly any sound ... go see a shrink. The same goes for unable to sleep at night, or can't focus at work because you are bother by slight noise.
http://www.worldwidewords.org/qa/qa-shr1.htm
If you can't hear what you boss tells you, go get your hearing test.
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