On 9/13/06 8:43 AM, in article , "Tim Williams"
wrote:

"Michael A. Terrell" wrote in message
...
dB without a reference is meaningless. How can you have a ratio
without a reference?

Easy. "dB" in general usually refers to acoustic power, where the reference
is some ungodly small power level (10^-12W/m^2 IIRC?).

I forget if there's a similar radio context used...

Tim

There is no exception; dB is meaningless without a reference. Decibel is
used in radio also.

Don