From: "Gregg Nemesure" 

"Phil Payne"  wrote in message
news:3F03EB70.95C66CF9{at}isham-research.com...

> 10 decibels is of course a bel.


Yes, and?

> Uh.  I thought 3db represented doubled of perceived power?

No, actual power:

   10 * log(2) = 3.01

This is generally considered the minimum perceived change. Doubling of
perceived sound level is generally conisidered to require multiplying the
power level by 10 (a 10 dB increase).

Gregg

--- BBBS/NT v4.01 Flag-4