[Randy Yates]

(Don Pearce) writes:
[...]
FFS. The dB is NOT a unit of anything. It is a ratio expressed in log
form for convenience (to avoid huge numbers). Nothing more and nothing
less.

"dB" is a ratio of powers.

http://www.digitalsignallabs.com/db.pdf

"dBm", "dBV", etc., are units.
--
Randy Yates % "...the answer lies within your soul
Digital Signal Labs % 'cause no one knows which side
% the coin will fall."
http://www.digitalsignallabs.com % 'Big Wheels', *Out of the Blue*, ELO