Vrms
Vrms
(OP)
How can Vrms be defined as relating to acoustics.
thanks
thanks
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RE: Vrms
Is that what you meant?
Cheers
Greg Locock
RE: Vrms
Cheers
Greg Locock
RE: Vrms
Then: Voltage ratio = 0.5012/1=0.5012
and dB difference = 20 log(base 10) x 0.5012 = 6 dB
The measured sound level is 94 - 6 = 88 dB
The formula is dB = 20 log V/Vref where
V = measured voltage
Vref = reference voltage (this can be changed on the analyzer and is usually set to 1 volt).
If you need in depth details, see the book "Acoustics" by Leo L. Beranek.
C. Hugh (www.Hatch.ca)