sound experts....need help, dBu and r.m.s. voltages?

[Swoop]

How do I work out the r.m.s. voltage of a -52dBu microphone?

[bcadoo]

Have you taken any readings?  Once you have use the method outlined here:

http://en.wikipedia.org/wiki/Root_mean_square

[Jenks]

Try this link  http://www.sengpielaudio.com/calculator-db-volt.htm

[FireDrgn]

Ok im curious........ Not sure I understand the question.

Is this what your looking for...


:"The degree of precision is up to you. You could measure the output with a multimeter that read directly in db..

Voltage ratio is antilog (dB/20)

On modern calculators antilog is 10^

If you entered -1 for the dB in that equation, the Voltage ratio is 0.8912509382 (just use the 0.891)

Now multiply that voltage ratio by the level you are working with....

0.891 x 1.228 = 1.094 volts RMS

Now multiply that by the peak to peak conversion = 1.094 x 2.8184 = 3.08 volts p-p.

+4dB is 1.228 x 2.8184 = 3.46 volts p-p"

Geoff'


If so  go here.......follow this link   http://www.auroraaudio.net/dcforum/DCForumID1/115.html


P.S  Im not a sound expert

[Swoop]

Jenks, that is absolutely spot on .

[Jenks]

Just curious, but why do you need the conversion?

[Swoop]

Mate of mine doing a degree in music theory, got completely lost on this bit and asked me for help.....like I know anything.

[Grayeagle]

College teaches you how to find out stuff

It's working

-GE