Killer Octave Question - S shape theory

[Isaac OLEG]

The discussion on that matter have been delayed a tad, I'll keep it
posted.

Seem to me logical that most of the soundboard take this shape sooner
or later, probably depending of the place the bridge lays it is more
or less pronounced.
Can't imagine what it gives from the acoustical point of view
(assuming the front bearing remains efficient).

That is a very reassuring theory nowadays ;>)

Best

Isaac OLEG

Entretien et reparation de pianos.

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> -----Message d'origine-----
> De : Ron Nossaman [mailto:RNossaman@cox.net]
> Envoye : samedi 19 avril 2003 15:55
> A : oleg-i@wanadoo.fr; Pianotech
> Objet : RE: Killer Octave Question - S shape theory
>
>
>
> >I repost that as I will have a discussion with a colleague
> about it.
> >
> >S shape as took by the soundboard under the bridge in the
> killer zone
> >being seen as a valuable profile from a stability point of view,
> >bridge top being shaped in prevision of this set. I
> believe that one
> >can eventually compute or ascertain where the inflexion
> point will be
> >installing under the load.
>
> I sure don't see any benefit. Sounds to me more like trying
> to turn a wart
> into a beauty mark because it's easier to sell than fix.
>
>
> >Reflex ion after having seen that harpsichord builders are
> supposedly
> >wanting this shape to install on their soundboards, for the same
> >stability reason (resistance to moisture change)
>
> I have no idea what harpsichord builders supposedly want,
> nor who is doing
> the supposing, but a typical piano soundboard that has
> taken that shape is
> hardly stable.
>
>
> >This is new to me (and not at all German for what I've heard yet !)
> >I'll keep that following soon.
> >
> >Isaac OLEG
>
> It's new to me too, just not very convincing.
>
> Ron N
>
>