simon chapman
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| posted on 17/4/09 at 09:27 PM |
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Noise levels
I need to know the noise level limit for the SVA/IVA some say 94 Db and some say 97 got a meter just need to know level
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BenB
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| posted on 17/4/09 at 09:36 PM |
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Is the noise meter calibrated? Otherwise I wouldn't bother. Most are +/- 3-4dB which is (in terms of noise level) double to three times as much
(or there's about, my log maths is failing me tonight after a little bit too much vin rouge).
IE you can quite spectacularly fail the SVA/IVA noise test despite a cheapy uncalibrated unit saying you're A1....
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iank
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| posted on 17/4/09 at 09:44 PM |
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SVA 101dBA @ 500mm and 45 degrees from the exhaust exit.
IVA 99dBA @ 500mm and 45 degrees from the exhaust exit.
IVA from Draft 3.2, SVA from the manual
Note it's dBA not dB they measure
http://en.wikipedia.org/wiki/A-weighted for the difference if you don't know
[Edited on 17/4/09 by iank]
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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smart51
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| posted on 18/4/09 at 06:58 AM |
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99dB for IVA.
BTW, 3dB represents twice the noise POWER but only a small increase in perceived volume. If you turn the radio up or down "a bit" most
people adjust it by about 3dB. 10dB is twice or half the perceived volume.
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