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<DIV><SPAN class=292254700-01032004><FONT face=Arial color=#0000ff =
size=2>Hi, my
take should lend towards longitudinal modes, that can be producing all =
kind of
funny effects when mixing with the "normal" vibrating modes of the =
string (phase
and reverse phase, added energy, perturbation of the =
curve)</FONT></SPAN></DIV>
<DIV><SPAN class=292254700-01032004><FONT face=Arial color=#0000ff =
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=292254700-01032004><FONT face=Arial color=#0000ff =
size=2>If in
the hammers, it ca be mushy shanks or a gap in the glue collar, but also =
a
certain density of the felt.</FONT></SPAN></DIV>
<DIV><SPAN class=292254700-01032004><FONT face=Arial color=#0000ff =
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=292254700-01032004><FONT face=Arial color=#0000ff =
size=2>Still
unsure of what it is you state .</FONT></SPAN></DIV>
<DIV><SPAN class=292254700-01032004><FONT face=Arial color=#0000ff =
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=292254700-01032004><FONT face=Arial color=#0000ff =
size=2>Best</FONT></SPAN></DIV>
<DIV><SPAN class=292254700-01032004><FONT face=Arial color=#0000ff =
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=292254700-01032004><FONT face=Arial color=#0000ff =
size=2>Isaac
OLEG</FONT></SPAN></DIV>
<DIV><SPAN class=292254700-01032004><FONT face=Arial color=#0000ff =
size=2></FONT></SPAN> </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px =
solid; MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT =
face=Tahoma
size=2>-----Message d'origine-----<BR><B>De :</B>
pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org]<B>De la =
part
de</B> Stéphane Hanriat<BR><B>Envoyé :</B> vendredi 27 =
février 2004
20:52<BR><B>À :</B> Pianotech<BR><B>Objet :</B> Kissing =
noise on
Kawai grand<BR><BR></FONT></DIV>
<DIV><FONT face=Arial size=2>Hello List,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I'm back with another topic I would =
like to share
with you.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>During the process of selecting my =
Shigeru piano,
I played a lot of Kawai instruments, and I found a strange noise =
impacting
very few notes, but always the same notes : 23, 24 and 25. The noise =
looks
like a whistling appearing at the attack, and is very easy to ear when =
playing
a non legato trill at pianissimo. This noise is clearly audible on =
most of
RX-2, SK2 (1.78 m), RX-3 and SK3 (1.86 m). Very difficult to ear it on =
larger
instrument. RX-6 or SK6 (2.12 m) do not have it. - sorry for the =
metric
unit -:)</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I had extensive discussions on that =
with our
french MPA who is now an expert to determine whether an instrument is =
having
the noise or not. We have contacted Kawai in Japan. They replied that =
this is
well known as "kissing noise" and that mostly all prestigious brands =
are
facing this problem that originates from hammer conditions. Kawai also =
told us
that Steinway has extensively studied the topic without =
identifying the
root cause ; and when the problem is creating inconvenience at =
playing,
Steinway is replacing the hammers...</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>We made some experiments at the =
french Kawai show
room on some RX, without being capable to find a reliable fix. Some =
pianos
were not having this kissing noise, but most of them had it in the
showroom.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>When I play grand pianos in this size =
range, I
always discreetly check the stuff... but I've not seen this kissing =
noise as
present as on the Kawai. I can tell you I've been cautious when =
selecting my
Shigeru, so it took me 2 years to find an SK3 almost free from kissing =
noise
(but not completely free).</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>If some of you have an explanation =
and/or a fix,
I would be very excited to learn this (and lot of MPAs too, believe
me).</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>Stephane Hanriat, the french guy who =
loves the
Shigeru's.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial =
size=2></FONT> </DIV></BLOCKQUOTE></BODY></HTML>