26 Feb
2006
26 Feb
'06
7:41 p.m.
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