Take a look http://www.cumpiano.com/Home/Guitars/Special/Graphite/graphite.html Serge Harel -----Message d'origine----- De : pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] De la part de Sarah Fox Envoyé : 9 octobre 2004 07:59 À : Pianotech Objet : Re: Glass soundboard Hi Cy, > Now, carbon fiber might be interesting... Indeed! I'm eagerly anticipating one of y'all getting into a radically experimental mood -- especially one of you soundboard gurus. Carbon fiber is being used very successfully for construction of the lower register string instruments and (I'm pretty sure) for guitars. They're still working on a carbon fiber viola and violin. Of course there may never really be a carbon fiber violin, since the design parameters of that instrument are so rigid. I suspect the chief complaint about the carbon fiber piano soundboard will be the same as that for the glass soundboard -- that there's too much sustain -- that it's too efficient. As I've suggested before, there are many ways to make the piano "perform" better, but at some point, the piano no longer sounds like a piano (in the inefficient sense that we all know and love). The steel soundboard piano is a case in point. A piece composed for a modern piano may not sound "right" on a piano of the future, much the same way that a piece composed for an ancient piano often has problems with regard to the modern piano (e.g. with regard to damping/pedaling). I might suggest, in the interim, that newer, more efficient soundboard materials might be made less efficient (and more "wood-like") by damping them with other materials. For instance, how about constructing a steel soundboard with an inner and outer skin and a thin core of tar-laden felt? As for the glass soundboard... I wonder what 50 years of age would do to it... Glass does become brittle with age. Even if the sound of the thing appeals to some folks, it will surely change, just as surely as wood. If I'm not mistaken, it will lose much of its flexibility with age, so bass response will be sacrificed somewhat. At the same time, the ear-shattering treble response will still be just fine. As the glass continues to harden, it will become brittle, so there will come a point that it might explode under the downbearing -- probably during a very loud chord! While this might be very "impressive" in concert <chuckle>, I wouldn't want to be the person at the piano! ;-) Peace, Sarah _______________________________________________ pianotech list info: https://www.moypiano.com/resources/#archives
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