I wonder if the bridge would move visibly for the lower monochord notes. Andrew At 02:46 PM 8/15/2005, you wrote: >Hello all. > >Reading this thread, I have (perhaps naively) >done the experience of hitting vertically one >single string installed in a piano , and >horizontally with a loose hammer I hold in my >hand. I was surprised to hear how much >difference there is in sound. When struck >vertically, the string produces much more volume >and pleasant sound than when struck horizontally. This is new to me. >Looking at the very nice documents posted by Pr. >S. Birkett, I noticed that you can't see the >bridge move under influence of the strings. Is >this because the magnitude of bridge motion is >invisible at this scale, or because the bridge >doesn't move that much, being after all a node in the whole story ? >Just wondering. > >Best regards. > >Stéphane Collin. > > > > > >----- Original Message ----- From: "Ric Brekne" <ricbrek@broadpark.no> >To: "pianotech" <pianotech@ptg.org> >Sent: Monday, August 15, 2005 8:48 PM >Subject: string terminations > > >>Hi Calin. >> >>My point was simply to point to information >>compiled by those scientists that have actually >>done some hard research. Most of what is tossed around back and forth here >>is speculation to some degree or another. Not >>that that is a bad thing mind you. But to at >>least read what research and real >>experimentation has been done seems to my mind >>a good idea before one starts drawing up any conclusions. >> >>Personally, I find the vertical vibration claim >>quite plausible, and there seems to be >>some basic maths that back it up. But I will >>refer any interested parties to the persons >>who've published on the matter. Both Stuart and >>Wapin have documentation worth reading. >> >>One other point.... just for thought. However >>a whole system achieves longer sustain, >>the string simply has to vibrate longer as a >>result. Without string vibration then there is >>no system vibration either. So what exactly >>about the vertical termination that causes this >>in both the Wapin and the Stuart terminations >>(one with virtual no mass increase, the other with about 1 kilo) ? >> >>Like I say, I find reading the available >>literature on the subject matter valuable. >> >>Cheers >>RicB >> >>------ >>The "vertical vibration claim doesn't seem very >>plausible to me (but i don't have any >>counter-arguments). I just think the way a >>bridge agraffe can improve sustain is just by >>virtue of its greater hardness (and weight), >>compared to a conventional bridge pin, which >>seems to be a pretty flexible contraption. >> >>Regards, >> >>_______________________________________________ >>pianotech list info: https://www.moypiano.com/resources/#archives >> > > >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives
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