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<DIV><FONT face=Arial size=2>Ric,</FONT></DIV>
<DIV><FONT face=Arial size=2>*lol* i donīt change the name since =
itīs my litlle
baby and i love it ;)</FONT></DIV>
<DIV><FONT face=Arial size=2>sound waves are periodic matter too so =
the name is
not so false *g*</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>cheers</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
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<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 =
9:22
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Longitudinal =
scaling</DIV>
<DIV><BR></DIV>
<P>Bernhard Stopper wrote:
<BLOCKQUOTE TYPE="CITE">
<STYLE></STYLE>
Dear Richard, <FONT face=Arial><FONT size=-1>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></FONT> <FONT
face=Arial><FONT size=-1>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 canīt
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></FONT></BLOCKQUOTE>
<P><BR>The basic sound production of the panel we all (well except a =
couple
die hards:) ) ended up agreeing couldnt be anything else then =
transverse...
but I held on to (and still do) the idea that related longitudinal =
waves pass
through the wood and influence somewhat the end transverse result. But =
then
I'm a bit off a free thinker here and tend to not always buy accepted =
ideas
about things unless the argumentation for them is overwhelmingly =
convincing.
Personally I think its a good idea to have a very healthy wad of the =
skeptic
in ones back pocket.
<P>Interesting tho that you should mention surface ripples in the =
context of
longitudinal waves... as the ripple argument had been used by one of =
the more
arduous participants as a description of transverse activity. I kinda =
fell for
the idea that ripples were really surface interphase of longitudinal =
waves of
a solid medium vibrating in a less solid one.
<P>No doubt tho that what we hear is directly produced from the =
soundboard
vibrating in transverse modes tho... I mean how else could you get the =
air
moving enough to hear things as loudly as we do.... whether =
longitudinal wave
activity in any of its forms actually get the surrounding air moving =
directly
or not is perhaps doubtfull... but I'm not sure it has to in order to
influence the end sound. <BR> <BR>
<BLOCKQUOTE TYPE="CITE"> <FONT face=Arial><FONT size=-1>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></FONT> <BR> <FONT =
face=Arial><FONT
size=-1>regards,</FONT></FONT> </BLOCKQUOTE>
<P>I've just installed the .Net stuff... I have a windows XP system =
with a 2.6
ghz... but it didnt come standard with .Net. Have always been doubtful =
as to
whether to install it... but I suppose I'll give it a whirl and check =
out
MiniMens....Tho you might want to consider coming up with another
name......grin.. in some places of the world MiniMens brings =
immediatly to
mind that very periodic condition women find themselves in during much =
of
their lives. Just a thought. :)
<P>Cheers <BR>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>
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