---------------------- multipart/alternative attachment Richard- Did you try accessing the ISMA document? When I go to their website I find links going back only to 1996. Also couldn't find quoted bulletin at Petrof. Looks interesting. Thanks. David Skolnik New York, NY skolnik@attglobal.net At 09:29 PM 01/24/2002 +0100, you wrote: > >Hi folks. > >This subject has been up from time to time with varying opinions about its >worth, and questions about whether or not factories use it, and why. I >like to try and ask people directly if I can, and I got this back from one >of the fellows at the research department at Petrof. Thought you might >like to hear what he had to say. > > >"Dear Richard >We are using EMA for piano design. Most of all we are observing modal shapes >of soundboard with / without bridge in free conditions. We have also >laboratory brass frame for fixed piano soundboard conditions (can be seen in >our web bulletin No 01/2000). Ocassionally we make also EMA of grand outer >rim. It can be helpfull for construction changes results observing . For >instance comparing of modal shape amplitude between soundboard and rim can >say something about acoustic efficiency of new prototype. >We made some works on computer modelling of piano soundboard by FEM and >comparing Fem model modeshape results with real soundboards from EMA. Some >results of my colleague work You can see at proceedings of ISMA 1995 France, >Dourdan - >Alois Raffaj: Vibrations of piano soundboards, pg 373." > > >-- >Richard Brekne >RPT, N.P.T.F. >Bergen, Norway ><mailto:rbrekne@broadpark.no>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/b1/1b/4d/8a/attachment.htm ---------------------- multipart/alternative attachment--
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