[LAD] twice as loud

[Ralf Mardorf]

On Fri, 2010-07-23 at 17:31 +0200, Ralf Mardorf wrote:
> On Fri, 2010-07-23 at 11:13 +0100, Frank Smith wrote:
> > Hi All
> > I was under the impression that every 3 db increase doubled the volume
> > and you needed to increase the power needed by a factor of 3 . Things
> >  could have changed by now but this is what I use.
> > 
> > 
> > Cheers
> > Bob
> 
> And ... 1 KHz sine wave vs music @ the same dB ... the basis has to be
> noise, representing the frequency spectrum regarded to the sensitivity
> of the human ear?! Or to usual music, usual speaking? ... dB is some
> artificial thingy itself.
> 
> A paradox, dB for audio claims to be related to the human ear.
> 
> I heard about 3 dB, 6 dB and 10 dB as twice as loud.
> 

I experienced 9 dB and 12 dB as twice as loud, but exactly 10 dB.

3 dB, 6 dB, "9 dB and 12 dB, instead of 10 dB" ... for my emotions there
is a math pattern.