Soundboards: Thickness and Area

[Calin Tantareanu]

Hi Richard !

Where ob the board does Steingraeber remove material from to get the sand to
accumulate on the edges?

 Calin Tantareanu
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 http://calintantareanu.tripod.com
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----- Original Message -----
From: "Richard Brekne" <Richard.Brekne@grieg.uib.no>
To: "Pianotech" <pianotech@ptg.org>
Sent: Monday, October 20, 2003 5:49 PM
Subject: Re: Soundboards: Thickness and Area


>
> They spread dark sand on the panel and then pound a bit on the bridge to
> see where the sand settles. They remove material from the soundboard
> until the sand accumulates in a very clearly defined thin boarder line
> about the edges of the entire soundboard. They are particularily
> concerned with the K point area which corresponds to the area in the
> treble where the so called killer octave phenomena occurs. But all
> around the edge of the soundboard they want a precisely defined line of
> sand.