Inharmonicity - so what?

[Richard Moody]

HI Jim 

>>My Steinway L has a resonant freq. at B1
> with the strings on and up to pitch<<

Yes! If that is what Del means by "If the fundamental resonant frequency
of the string loaded soundboard
assembly" I would like to know if this can be determined in the manner of 
"thumping the unstrung sb with fists" you describe, and I have seen others
do. 

With the dampers up or down?   I have "always" rapped the SB with my
knuckles, as in knocking on a door. They all sound the same unless in the
same room and compared to each other. 

I guess I got into this habit when I read how an early instrument maker
tapped the planks of sound board material and chose accordingly.   I don't
know what this really does other than make a little more sense than
kicking the tires. ; )

BTW, Your L sounds better with one string than most pianos do with three
strings.  I don't believe I heard it un-muted. 

>>hit the 
> soundboard with a tympani mallet or even your fist. You will hear a
resonant
> frequency << . 
>>I would go 
> around at night and give a fist test to all the pianos in 1st belly
station.<<

	I guess us soundboard "thumpers" should start a "club". 

Richard The Rapper

----------
> From: Jim Coleman, Sr. <pianotoo@imap2.asu.edu>
> To: Richard Moody <remoody@easnet.net>
> Cc: pianotech@ptg.org
> Subject: Re: Inharmonicity - so what?
> Date: Thursday, August 20, 1998 12:45 PM
> 
> Hi Richard:
> 
> The next time you rebuild a Grand, while the strings are off, hit the 
> soundboard with a tympani mallet or even your fist. You will hear a
resonant
> frequency around A1, B1 or C2. A large grand may have a resonant freq. 
> as low as F#1 or maybe even lower. My Steinway L has a resonant freq. at
B1
> with the strings on and up to pitch. When I worked at Baldwin, I would
go 
> around at night and give a fist test to all the pianos in 1st belly
station.
> That's where the soundboards have just been glued in. The Concert grands
> had lower resonant freqs. than the small M's did. After stringing, the
> freq. is a little higher due to the loading and added stiffness.
> 
> Jim Coleman, Sr.
> 
>  On Thu, 20 Aug 1998, Richard Moody wrote:
> 
> > 
> > ----------
> > > From: Delwin D Fandrich <pianobuilders@olynet.com>
> > > To: pianotech@ptg.org
> > > Subject: Re: Inharmonicity - so what?
> > > Date: Wednesday, August 19, 1998 1:54 AM
> > 
> > 
> > >If the fundamental resonant frequency of the string loaded
>soundboard
> > assembly 
> > 
> > How is this freq determined? 
> > Ric
> > 
> >