View Full Version : Sound Power Level definition
Cewek ITS
13-10-2008, 03:39 AM
Dear All,
I get question from my colleague, but I am confused how to define it clear and understandable. What does Noise power level in fan exactly mean ?
BR
nike123
13-10-2008, 08:55 AM
Google is your friend, my friend!
http://en.wikipedia.org/wiki/Sound_power_level
http://en.wikipedia.org/wiki/Noise_level
nh3simman
18-10-2008, 12:18 PM
Sound power is a function of the machine. It doesn't matter where you stand, it is a fixed value.
Sound pressure is what you hear. This value is affected by attenuation in the ducting, the room absorptance and the distance from the listener.
A small confusion is that both have the same units (decibels).
mkardehi
27-10-2008, 12:57 PM
Hi;
measuring sound pressure has different standards and classes which differents are on weighting diffferent frequencies .... for example class A is weighted frequencies which human can hear . you can find more on google .
good luck;)
Powered by vBulletin® Version 4.2.1 Copyright © 2024 vBulletin Solutions, Inc. All rights reserved.