On Sun, Feb 26, 2006 at 11:36:26PM +0000, Dan Mills wrote: > 0dB indicates a signal having the same power as the reference (in > this case 0dB indicates a signal having an amplitude of 20uPa). Note > that referencing a scale based on power to a pressure level is a > little unnatural, but as long as the base pressure and viscosity are > constant it can be done. IIRC the brownian motion of air molecules is not so far below 0dB. -- FA
