Re: Amplitude Decibel conversion problem

On Oct 8, 10:10 pm, Jerry Avins <j...@[EMAIL PROTECTED]
> wrote:
> cs_post...@[EMAIL PROTECTED]
 wrote:
> > On Oct 8, 4:11 pm, c...@[EMAIL PROTECTED]
 wrote:
>
> >> I agree that there is an implicit ratio since a log(0) raises issues
> >> in terms of doing some kind of measurement.
>
> > Nope.   That's not the problem.
>
> >> I was trying to get at the
> >> fact that we don't put an additional letter to denote the reference
> >> such as the case with dBm and dBw.
>
> > You're doing it wrong.
>
> > You cannot measure anything with a dimensionless number, which is what
> > dB is.  You can only measure the ratio between two somethings, and you
> > have to state what the reference one is.   It matter's not a bit that
> > your reference is people, you still have to state it.
>
> power/people is not dimensionless.

But power perceived by people is precisely the part he was leaving
out.

power/power is dimensionless, it's just a ratio - and the problem is
leaving out what it is a ratio in relation to.