.9 Stone to DB ?

[Dissolved]

The NV Silencer 5 (Rev. 3) is rated .5-.9 Sone and im trying to figure out how many DB that is?

im trying to get all my system fans under 25db load.

Thanks.

[mtb856]

Well, here's the best that I could come up with... it's sones btw, not stones.


Wouldn't it be great to be able to convert from dB (which can be measured by an instrument) to sones (which approximate loudness as perceived by people)? This is usually done using tables that you can find in acoustics handbooks. However, if you don't mind a rather crude approximation, you can say that the A weighting curve approximates the human frequency response at low to moderate sound levels, so dBA is very roughly the same as phons.

and finally


A sone is defined to be equal to 40 phons. Experimentally it was found that a 10 dB increase in sound level corresponds approximately to a perceived doubling of loudness. So that approximation is used in the definition of the phon: 0.5 sone = 30 phon, 1 sone = 40 phon, 2 sone = 50 phon, 4 sone = 60 phon, etc.

so I'm guessing it's about 35dB?

[Dissolved]

well, this was on the Arctic cooling website:

Noise Level
All measurements are taken using full fan speed.
The noise level is measured in Sone (loudness) instead of dB (sound pressure).
The loudness depends upon ears response curves and tells you exactly, how bothering a certain noise is. Sone takes the frequency and bandwidth of a sound into account.
A doubling of the number of Sones sounds to the human ear like a doubling of the loudness.
The comparison of products from different manufacturers is basically impossible, since all manufacturers measure in different ways. Even a rough translation from Sone to dB doesn't help. A 15dB cooler can be louder than a 1 Sone cooler from another manufacturer.

Nevertheless with the Sone data you can compare our coolers between each other and get a quite precise idea how annoying the product will be.
1 Sone: nearly inaudible in a computer case
2 Sones: clearly audible
3 Sones and more: disturbing



So That doesnt really help.
Its not a big deal, ive had 3 of these and only one was noisey cuz i think it was dirty or had a unbalenced fan.

[mtb856]

Well, phones are measured at 1000hz..... so I would imagine that loudness would be too? Given that they have an equivalency between phones and sones (1 sone is 40 phones), you would think that they would be sampled at the same frequency.

Who knows though.... I guess you'll just end up doing it by ear and just watching your temperatures.

[Dissolved]

well, i just ordered a bunch of 22cfm 24db fans, so the loudest fans in my system are my cpu and 7800gt.

so hopefully the artic cooler, the coolmaster fans, a BT, and the ocz fan will be slient enough.