In article ,
harrogate wrote:
Almost correct - I think? Except 0dB in audio is actually 0dBm which
equates to 1mW into a resistive load, by convention accepted as 600R
unless otherwise stated. 1mW into 600R is almost exactly 775mV.

Indeed. And with 'voltage' dBs, which will be the type used for quoting
the loudness of appliances etc, 6dB is a doubling of the actual voltage
measured. 3dB is a doubling of power, so applies to amplifiers, etc.

--
*He's not dead - he's electroencephalographically challenged

Dave Plowman London SW 12
RIP Acorn