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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=Erwinspiano@AOL.COM
href="mailto:Erwinspiano@AOL.COM">Erwinspiano@AOL.COM</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A =
title=pianotech@ptg.org
href="mailto:pianotech@ptg.org">pianotech@ptg.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> January 08, 2002 7:03 =
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Stein grand unique =
board</DIV>
<DIV><BR></DIV>
<DIV><FONT face=arial,helvetica><FONT size=2> Del <BR>I was =
trying to
respond to your last post and hit he delete on your message,If you see =
this
could you repost it for me.
<BR> Thanks---Dale Erwin
</FONT></FONT></DIV></BLOCKQUOTE><FONT face=arial,helvetica><FONT =
size=2>
<DIV><FONT face="Lucida Sans" color=#000080 =
size=3></FONT><BR><FONT
face="Lucida Sans" color=#000080 size=3>Dale,</FONT></DIV>
<DIV><FONT face="Lucida Sans" color=#000080 =
size=3></FONT> </DIV>
<DIV><FONT face="Lucida Sans" color=#000080 size=3>If it's not =
this one then
it's gone to the great ether hole in the sky:</FONT></FONT></FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
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<DIV><FONT face=arial,helvetica><FONT size=2><FONT face="Lucida =
Sans"
color=#000080>I'll point out once again that the pond analogy is not =
a very
good one. These are surface waves while the motion of the =
soundboard--at least
the motion that is creating sound energy is quite different. The =
system is
vibrating as a unified whole.</FONT></DIV>
<DIV>
<DIV><FONT face="Lucida Sans" color=#000080></FONT> </DIV>
<DIV><FONT face="Lucida Sans" color=#000080></FONT> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
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<DIV><FONT face=arial,helvetica><FONT lang=0 face=Arial =
color=#000000
FAMILY="SANSSERIF"> Perhaps Phil Ford and Charles =
Fredrick
Stein has a valid point that we should consider the reflective =
wave as
of lesser importance, though not unimportant, when designing a =
soundboard
system, apparently Charles did. </FONT></FONT><FONT
face=arial,helvetica><FONT lang=0 face=Arial color=#000000
FAMILY="SANSSERIF"><BR> As Del =
has said
the soundboard system functions as system and what we seem to be =
doing here
is consider the various individual component aspects as to =
there
contribution to sound production as a system. Seems to me like a =
healthy
thing for a think tank to do. </FONT></FONT></DIV></BLOCKQUOTE>
<DIV><FONT lang=0 color=#000000 FAMILY="SANSSERIF"><FONT
face="Lucida Sans"><FONT color=#000080>As long as there is any =
vibrations felt
in the rim there are associated energy losses from the soundboard. =
Whether you
view this as energy not reflected back into the soundboard or as =
energy losses
from the soundboard to a less than perfectly massive and rigid rim is
irrelevant--it is still reducing the sustain time of the =
system</FONT>.
</FONT></FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face="Lucida Sans" color=#000080 =
size=3></FONT> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
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<DIV><FONT face=arial,helvetica><FONT lang=0 face=Arial =
color=#000000
FAMILY="SANSSERIF"> Another thought that occurs =
to me is,
that however the listener would describe the overall sound of the =
Stein
system, that sound will have to be partially ascribed to the =
lack of
reflected energy from the rim on the straight side and curved side =
of the
rim even though we can't dissect or isolate it. Alas another
mystery. </FONT></FONT></DIV></BLOCKQUOTE>
<DIV><FONT face="Lucida Sans" color=#000080>How would you describe =
the
function of those relatively thick ribs that--unless I completely =
mis-read
your description of them--remain solidly glued to the inner =
rim?</FONT></DIV>
<DIV><FONT color=#000080></FONT> </DIV>
<DIV><FONT face="Lucida Sans" color=#000080 =
size=3></FONT> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000080 2px solid; MARGIN-RIGHT: 0px">
<DIV><FONT face=arial,helvetica><FONT lang=0 face=Arial =
color=#000000
=
FAMILY="SANSSERIF"> </FONT><FONT =
lang=0
face=Arial color=#000000 FAMILY="SANSSERIF"> Also perhaps =
the fact that
all the end grain of the soundboard panel is terminated at the belly =
rail,
which as Del pointed out, adds all the stiffness the trebles require =
to
function. Afterall sound travels along the grain faster than across. =
My
deduction from all this is that the tail end of the piano is not as
drastically compromised by having a pseudo free floating edge around =
the
majority of its perimeter. </FONT></FONT></DIV></BLOCKQUOTE>
<DIV><FONT face="Lucida Sans" color=#000080>And I would suggest =
that this is
not even close to being a pseudo free-floating soundboard system.
Free-floating means free-floating as in not attached to the rim in any =
way.
And those ribs being glued to the inner rim are not at all =
free-floating. Nor
is the soundboard system as long as <FONT color=#000080></FONT>the =
soundboard
panel remains glued to those ribs. </FONT></DIV>
<DIV><FONT face="Lucida Sans" color=#000080></FONT> </DIV>
<DIV><FONT face="Lucida Sans"
color=#000080>Del</FONT></DIV></DIV></BLOCKQUOTE></FONT></FONT></BODY><=
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