Jack, Excuse my style of responding as well as some of the other nuances that accompany my post. I have no way, at least that I'm aware of, to import the text of a previous post. I also have no control over the format. It seems that it always sends my phone number. In answer to your question. I must say that I'm not sure. I think that there are many factors. Physicists use the terms Impedance and Admittance. I think that there meanings are somewhat similar to the meanings they have in the field of electronics. I have also heard the terms "strong coupling" and "weak coupling". A strong coupling is one where you might say there is little or no lost motion (to connect to terminology that we are familiar with) and a weak coupling is like lots of lost motion but the bridle strap is still connected. In terms of energy a strong coupling would indicate a quick transfer of energy and a weak coupling means a loss of energy through the coupling but at a very slow rate. But there are other things to consider in a piano string when talking about coupling the most importantly the capo, agraffes, and bridge pins. I can refer anyone who is interested to a book "The Physics of Musical Instruments" by Fletcher and Rossing, Springer-Verlag, 1991. It has a section devoted to the peculiarities of the piano, with references to Conklin, Sanderson, and some work done here at Cincinnati on soundboards by Wang and Kindel. There is a chapter on the String equations and one on Couplings. I think that this can be shown fairly easy by an experiment, that is, we can aquire the empirical data that will show a direct connection between the downbearing and the rate of decay. Saying why it is so is a different matter and can never be totally conclusive. Michael Wathen --Boundary (ID qfM0x2OL+svPlhqRbH/n/w)--
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