NOTE: THIS DOCUMENT IS OBSOLETE, PLEASE CHECK THE NEW VERSION: "Mathematics of the Discrete Fourier Transform (DFT), with Audio Applications --- Second Edition", by Julius O. Smith III, W3K Publishing, 2007, ISBN 978-0-9745607-4-8. - Copyright © 2017-09-28 by Julius O. Smith III - Center for Computer Research in Music and Acoustics (CCRMA), Stanford University
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DBV Scale
Another dB scale is the dBV scale which sets 0 dBV to 1 volt. Thus, a 100-volt signal is
and a 1000-volt signal is
Note that the dBV scale is undefined for current or power, unless the voltage is assumed to be across a standard resistor value, such as 600Ohms.