Sound waves(The behavior of soundboards)

[Richard Brekne]

Robin Hufford wrote:

> Richard,
>      Notwithstanding conventional opinion doesn't it plainly show that
> longitudinal waves can, in fact, induce whatever wave motion exists in the
> soundboard and do so in these instances?

I think that's exactly what I said. :)

> How this could insignificant is
> incomprehensible to me.   The question then becomes "Can the transverse
> loading (and by this I take it the Cyclic Pressurists meaning excursion of
> the string during its standing phase)" induce similar effects such as are
> proven to exists in definite longitudinal loading.  I am merely posing a
> question here not offering an answer.

Good question as far as I can see.  What I don't see is why such folks as
Askenfelt, Russell, Weinreich, and others of their sort, who have all studied
these matters at length seem to be saying that the answer in our specific
discussion lies elsewhere.

Course they could all be just figuring,,,, heck this fellow is an every day
pianotech and doesn't understand much more then 12th grade physics... so we
give him the simple version... or perhaps the difficult version is just a more
detailed bunch of same.... what do I know.

While you are on about Tuning Forks tho...(in your other post) I figured I
would drop this due to the nature of the response I got last time (not from
you), but someone (I wont say who) said something mixed in with a lot of
unnecessary crass commentary about geometry being used to describe the
elongation that happens in the shaft  when the tuning fork tines are in
motion.  Incredibly complex you see.... high school geometry no doubt. Euclid
in motion. :)

>
> Regards, Robin Hufford
>
> Richard Brekne wrote:
>
> >
> >
> > The point of this experiment is to show that Longitudinal waves can be
> > introduced to the bridge and doing so will result in sound eminating from
> > the soundboard. Or you can take it the other way and pump it across town
> > into a zither if you want I suppose.
> >
> > None of this tho goes to show anything at all about the kind of waves
> > generated in either soundboard or bridge.
> >
> > --
> > Richard Brekne
> > RPT, N.P.T.F.
> > Bergen, Norway
> > mailto:rbrekne@broadpark.no
> > http://home.broadpark.no/~rbrekne/ricmain.html




--
Richard Brekne
RPT, N.P.T.F.
Bergen, Norway
mailto:rbrekne@broadpark.no
http://home.broadpark.no/~rbrekne/ricmain.html