Tim Williams wrote:

"Telamon" wrote in message
...
My point was that some otherwise ambiguous dB scales (at least one) have
a
defined absolute basis.

Like Michael stated dB is a logarithmic reference-less ratio value.

So what is acoustic dB?
http://home.new.rr.com/trumpetb/audio/dBexamp.html
SPL, I should say.

There it lies, x dB on the left scale.


Read this Sound Level Meter manual if you want to understand that
chart.

http://rsk.imageg.net/graphics/uc/rsk/Support/ProductManuals/3304050_PM_EN.pdf


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida