View Single Post
  #96   Report Post  
Posted to rec.woodworking
dpb dpb is offline
external usenet poster
 
Posts: 12,595
Default Festool power tools.

On 2/3/2012 2:27 PM, Swingman wrote:
On 2/3/2012 1:10 PM, dpb wrote:

I looked at it in the lab w/ a signal analyzer in years gone by when a
coworker who was an audiophile was making the same claims and there
simply wasn't any measurable difference in the signal.


Laughable folly to any acoustic engineer.

It is fruitless, if not impossible, to compare the non-linear,
physiological properties of human hearing to a instrument signal
analyzer ... period, zero, zip, nada ... any comparison simply does not
_scientifically_ equate.

You can't (and no
one else can) hear what isn't there


Wanna bet?

A very common (due to psychoacoustic properties of the human ear)
phenomenon in the studio is a "ghost sound" on a recording; a sound not
actually physically recorded, but heard very clearly when two or more
tracks are combined to excite partials and overtones ...

.... IOW, you are indeed "hearing what isn't there".


....

Last, first...

But then it is there, but it's generated past the wire in the air and
that can, indeed, be measured.

For the point of what matters regarding the wiring, it _is_ exactly
equatable. If, given the same inputs, there is no attenuation or
amplification or distortion in the wire that is discernible, then the
output will be indiscernible audibly if that input is converted to sound
by the same speaker.

Whatever is generated owing to distortion, harmonics, etc., etc., in the
speaker and the environment is there, certainly, but it had nothing to
do w/ the two wires over which the output of the amplifier was
transmitted to the speaker.

--