<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <META content="MSHTML 6.00.2800.1276" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV>Dear Richard,</DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV> <DIV><FONT face=Arial size=2>nice to hear to be welcome = here. if i had knwon that ther is so much traffic with interesting discussions i had = been here earlier ;)</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV></DIV> <DIV><FONT face=Arial size=2>maybe there is some considerable amount = of longitudinal compression/decompression in the soundboard wood... = but i think the role it plays for sound is much smaller than the transverse = part of the longitudinal string movement. since the longitudinal wave in = the wood can´t radiate effectively to the air if the soundboard is perfectly = straight. on the other hand lets consider a bowed soundboard, then it could be = possible that the waves running along the top of the surface (because = their vector direction is different of the direction of the bowed = soundboard plane ) radiate quite well in the air at this moment.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>The MiniMens Simulator is the first = step to the new Mensurix program. Glad to here from you that there are some people = waiting for it. The new Windows version will be in english. Minimens Simulator will = be the computing heart of it. So if you start with MiniMens i will grant an = update for just the difference in price. supporting me in bying the MiniMens = simulator now will speed up mensurix development =)</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>regards,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>bernhard</FONT></DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B> <A title=Richard.Brekne@grieg.uib.no href="mailto:Richard.Brekne@grieg.uib.no">Richard Brekne</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = title=pianotech@ptg.org href="mailto:pianotech@ptg.org">Pianotech</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, December 15, 2003 = 3:55 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Longitudinal = scaling</DIV> <DIV><BR></DIV>  <P>Bernhard Stopper wrote: <BLOCKQUOTE TYPE="CITE">Ric, <P>soundboard must not be able to vibrate longitudinally to = reproduce <BR>longitudinal string movement cause the bridge responds to the longitudinal <BR>wave orthogonal and thus producing transversal = movement on the soundboard. <P>regards <BR>bernhard <BR>  <BR><A = href="https://www.moypiano.com/resources/#archives"></A> </P></BL= OCKQUOTE> <P><BR>That seemed to be the reigning opinion last year as well... and = tho I tried my best to look at the reaoning behind those who said = otherwise... in the end I was swayed by fellows like Anders Askenfelt and the like... = who aggree that the board vibrates primarilly transversely. Still.... = there is something ...shall we say sexy ??? about the idea that some degree of longitudinal wave action is pumping through all that mass and playing = some kind of role in the sound. And if a Professor from the University of = Purdue who is studying exactly this subject matter is to be believed... then = perhaps there is something to it afterall. <P>Mind you... I'm hardly the physist enough to say which way or the = other myself.... tho its sometimes easy enough to see when others are trying = to blow bigger smoke rings then their skills allow for.... but thats another subject..... Either way... its an interesting subject and I have a = feeling you would have been a valuable participant to that disscussion... which = waged on for well 45 days. One of our better banterings here on Pianotech. To = the irriatition of some... and to the fascination and enjoyment of many. <P>btw Bernhard. Did you ever get an english version of your Mesurix = program done ? I know several (including myself) who would love to purchase = that. <P>Cheers, and glad to see your name up here. I do hope you choose to = stay around for a good long while. <P>RicB <P>-- <BR>Richard Brekne <BR>RPT, N.P.T.F. <BR>UiB, Bergen, Norway = <BR><A href="mailto:rbrekne@broadpark.no">mailto:rbrekne@broadpark.no</A> = <BR><A = href="http://home.broadpark.no/~rbrekne/ricmain.html">http://home.broad= park.no/~rbrekne/ricmain.html</A> <BR><A = href="http://www.hf.uib.no/grieg/personer/cv_RB.html">http://www.hf.uib= .no/grieg/personer/cv_RB.html</A> <BR>  </P></BLOCKQUOTE></BODY></HTML>