Re: Is this a good way to test pre-amp hiss of a digital recorder?
- From: Bob Cain <arcane@xxxxxxxxxxxxxxxxx>
- Date: Tue, 06 Jun 2006 16:04:14 -0700
Pooh Bear wrote:
Bob Cain wrote:
------------------------------------------------------------------
The thermal noise of a resistor is equal to:
Vt = sqrt(4kTBR)
where:
Vt = the rms noise voltage
k = Boltzmann's constant 8.617339*10^-5 volts/Kelvin.
T = temperature(Kelvin)
B = noise bandwidth(Hz)
R = resistance
-------------------------------------------------------------------
Uhuh. Boltzmann's constant is 1.38.10^-23
Graham
That's in Joules/Kelvin. I chose the Volts/Kelvin value because at
first glance its units seemed more appropriate. Perhaps that's wrong.
Bob
--
"Things should be described as simply as possible, but no simpler."
A. Einstein
.
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