string termination

David Ilvedson ilvey@sbcglobal.net
Wed, 17 Aug 2005 19:26:07 -0700


I have been perusing the web for an actual diagram/picture of the Stuart bridge set up and can't find one....any help on this?

David Ilvedson



----- Original message ----------------------------------------
From: Ric Brekne <ricbrek@broadpark.no>
To: pianotech <pianotech@ptg.org>
Received: Mon, 15 Aug 2005 09:06:03 +0200
Subject: string termination


>Hi Calin.

>Calin writes:

>You both think that the Stuart agraffe doesn't make a better termination? I 
>would think it does, because it is a harder surface than a conventional 
>bridgepin+wood termination, and would thus be somewhat less flexible, 
>causing less energy (high freq. especially) to be lost.
>No doubt that the agraffe's mass can also contribute.

> Calin Tantareanu

>-------------------------

>I would think so as well.  Perhaps if one contacted Stuart one could 
>aquire some hard data on the subject ??

> From an article on the subject....

>    "After years of experimentation, Wayne Stuart developed a special
>    clamp to keep the vibrations vertical. Eager to discover if his
>    invention was a fluke or could be scientifically proven he called in
>    the expertise of Robert Anderssen from the Australian science
>    agency, CSIRO."

>    ........................

>    "Applying the maths of vibrating strings, some of it going back to
>    Pythagoras, Robert was able to show mathematically that the clamps
>    ensured a more harmonious and clearer singing sound.

>    "Those notes are more harmonious because the string is kept
>    vibrating vertically and the energy in the vibrations is dissipated
>    more slowly and that's what the musicians call sustain and volume."


>The person making this claim can be reached at

>Dr. Robert Anderssen
>Computer Science and Information Technology Building
>Australian National University
>North Rd
>Acton ACT 2601
>Bob.Anderssen@csiro.au <mailto:Bob.Anderssen@csiro.au>

>--------------


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