---------------------- multipart/alternative attachment Delwin D Fandrich wrote: > > Does this item have a specific / proper name? > > If there is, I don't know it. I've always heard it > referred to as "the bell." > > > > > I'm not sure I understand your point about > damping here. I thought you were of the opinion > that the problem with internal damping was that > it absorbed to much energy, tho here you are > concerned about the plate actually vibrating to > much, and the purpose of the device itself > supports you. > > Only in a perfect world are vibrating string terminations > unaffected by vibrating strings. In our world things > aren't so clean. > > The whole meaning of 'high internal damping' means that > vibrating energy transferred into the material in > question--from whatever driving source--is readily > absorbed and converted into heat. Ok... but it also means that the material doesnt vibrate readily.... or what ? > Gray iron is massive (but not perfectly massive) and it is > moderately stiff (not perfectly stiff). The bell/bolt > arrangement effectively adds both mass and stiffness to > the hitchpin panel, reducing the amount of energy this > panel easily accepts from the strings, hence keeping more > energy in the strings to be used to move the bridge. > I get your point now, I think anyways.... You are saying that because of the lack of stiffness in this area of the plate the thing accepts vibration energy and converts it into heat. So if the plate is stiff enough... or massive enough (kind of the same thing in different way) it wont accept any (or much) vibration energy in the first place to get converted. I think I feel a little head ache comming on tho concerning the seperating between internal damping, and exterior vibration. :) > > Del > Thankyou kindly Del. RicB -- Richard Brekne RPT, N.P.T.F. UiB, Bergen, Norway mailto:rbrekne@broadpark.no http://home.broadpark.no/~rbrekne/ricmain.html ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/0c/68/9a/1a/attachment.htm ---------------------- multipart/alternative attachment--
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