Re: What's the use of a 192 kHz sample rate?

On May 8, 2:59 am, John Phillips <news0...@[EMAIL PROTECTED]
>
wrote:
> On 2008-05-07, Steven Sullivan <ssu...@[EMAIL PROTECTED]
> wrote:
>
> > ... It seems extremely likely, for example, that no one
> > can actually *hear* frequencies above the mid-20 kHz.
> > They can be perceived via bone conduction, if the signal
> > is  generated right at the skin surface.
>
> This seems to be confirmed in Oohashi's 2006 "Hypersonic effect" paper
> [1] which seems to show that the "inaudible high frequeny content"
> of his test material is not perceived directly through the ear but is
> perceived through the body surface.

As is often the caxse, it's interesting to note the background
to such reports. Oohashi's peper was presented to the AES,
but met with a great deal of skepticism centered around
the statistical methods, sound pressure levels and, especially,
the apparent rejection of data that did not support the
premise. (Now, one might argue that it was rejected
because of it's "radical" findings that were "contrary to
the establishment" and all that but given the review voard
on the AES AND the level of criticism that was levelled
at the papers basic techniques, this criticism seems a
bit wide of the mark).

It's also interesting to note that a major portion of the
funding and sponsorship of the project came from one
or more manufacturers who had a direct financial stake
in the success of high sample-rate technology at the
consumer level

The point being that Oohashi "confirmed" nothing of the sort,
especially considering the results, thus far, have not been
reproduced by any independent researcher.

The "bone conduction" hypothesis is a favorite piece of
fairy dust often invoked in the high-end audio realm as a
means of trying to justify high sample rates.

All of these "hypotheses," even Oohashi's, if it is ever
reproduced, all suffer from any number of serious PHYSICAL
problems: the attenuation of high frequencies in air, the
severe attentuation of high frequencies in the soft tissue
that sits between and around any potential source and
the proposed detection aparatus, the almost TOTAL lack of
these signals on ANY recordings whatsoever, the almost
TOTAL lack of these signals issuing forth from
mechanical transducers. and on and on and on.