Call for scaling spreadsheets

[alan forsyth]

David Love said , "The higher tension scales will have
lower inharmonicity.  "

I have not found this to be true. What I have found is that higher tension
still has higher inharmonicity, but it's the RATE of increase in
inharmonicity that decreases.
We've all been led to believe that inharmonicity is caused by the stiffness
of the wire; hence if the tension increases, surely the stiffness increases.

AF




----- Original Message ----- 
From: "David Love" <davidlovepianos at comcast.net>
To: "'Pianotech List'" <pianotech at ptg.org>
Sent: Friday, September 29, 2006 7:00 PM
Subject: RE: Call for scaling spreadsheets


>I wouldn't think too long about it--unless it's to more clearly define
> terms.  Higher tension scales such as found on concert instruments
> "project"
> much better than low tension scales.  The higher tension scales will have
> lower inharmonicity.  Tuning the upper treble sharp has little to do with
> inharmonicity or projection.  It may, however, help with the top being
> perceived as flat when heard from a distance.
>
> David Love
> davidlovepianos at comcast.net
> www.davidlovepianos.com
>
> -----Original Message-----
> From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On
> Behalf
> Of Ric Brekne
> Sent: Friday, September 29, 2006 10:34 AM
> To: pianotech at ptg.org
> Subject: Call for scaling spreadsheets
>
> Hi Stéphane
>
> This is interesting.  I hadnt thought along the lines of overall
> projection being linked to overall inharmonicity.  Yet some of the
> tuning discussions we've had through the years here are perhaps not too
> far removed from that kind of thinking.  For example it is ofte times
> mentioned that stretching the top more then is up front comfortable can
> result in better projection through a large hall.
>
> I'd like to hear more of your thinking about along these lines.
>
> Cheers
> RicB
>
>     Sure.  But when I meant projection, I didn't mean loudness.  You have
>    pianos that sound very loud at 1 or 2 meters around them, but the
>    loudness
>    decreases rapidly with the distance.  Others (I have a particular and
>    amazing straight strung 1873 Bechstein in mind) seem to have some
>    obscure
>    acoustic feature that makes them carry their sound way farther
>    effortless, a
>    bit like some venues acoustics (I think of the Concertgebouw in
>    Amsterdam,
>    Netherlands,  here) where at the very back of the place, you still
>    hear the
>    tongues in the throats of the singers.  I believe this has to do with
>    inharmonicity, not only with loudness.  Harmonic sounds can (do)
>    cancel each
>    other.
>
>    What do you think ?
>
>    Stéphane Collin.
>
>
>
>
>
>