Piano acoustics

[Richard Moody]

Before experimenting is done the periodicals should be researched to see
what if any has been already published.
    So that is why I asked if any on the list knows of articles published
of
experiments done on piano string inharmonicity specifically of a string
clamped between two steel blocks. This could be compared to the
research of piano strings attached to soundboards of which there are
quite a few articles in scientific journals.     A practical outcome would
be if there is "significant" differnce between the string vibrating by
itself vs the one vibrating on a soundboard.  If there are no significant
differences then the claims of soundboard or hammers affecting
inharmonicity would needed to put to the same formal proof.   Another
intersting experiment would be to establish the margin of error of any
given ETD or other instrument used to measure inharmonicity.
---ric

ps You asked how often I was asked to tune a string not  connected to a
soundboard and actually I did that many times.  The Yamaha CP 70 and 80
had no soundboards, only electronic pickups.   This would not be a good
instrument to study inharmonicity unless there are strings in the CP that
are same dimensions as acoustic pianos.


----- Original Message -----
From: Ron Nossaman <RNossaman@KSCABLE.com>
To: <pianotech@ptg.org>
Sent: Monday, February 04, 2002 8:06 AM
Subject: Re: Piano acoustics


Ric wrote
| >Yes! but I thought what if the inharmonicity of a vibrating piano wire
is
| >different than when connected to a bridge and piano soundboard?

Ron replies
| And that would matter how, practically? How often are you called upon to
| tune a string not connected to a bridge and soundboard?
|
|
Ric rote
| >I  would like to see experiments on piano wire clamped
| >between two huge steel blocks with lengths appropriate to piano speaking
| >lengths to see if the vibration (esp the partials is different).  These
| >experiments might
| >determine if the soundboard affects inharmonicity.


| Then go for it. You can be the one that adds that data to the literature.
| Ron N