High overtone

[Frank Emerson]

The key is if you change the frequency of the fundamental, and the
frequency of the undesirable partial does not change, it is, certainly, a
longitudinal mode partial.  If this is the case, the solution is in
rescaling.  You cannot change the frequency of the longitudinal mode
partial short of changing the relative diameters of the core and wrap. 
Generally, it is best to have a longitudinal mode partial frequency that is
remote as possible from a harmonic partials.

Frank Emerson


> [Original Message]
> From: Paul Chick \(Earthlink\) <tune4 at earthlink.net>
> To: Pianotech List <pianotech at ptg.org>
> Date: 13/6/2007 AM 8:45:35
> Subject: RE: High overtone
>
> David and others: if the pitch change technique works or diminishes the
> problem, what would be the next step to keep the overtone diminished or
> better nearly inaudible?
> Paul C
>
> Subject: RE: High overtone
>
> As someone else mentioned this sounds to me like a longitudinal mode
> frequency.  Change the pitch of the note and see if the pitch of the
> whine changes or if it goes away.
>
> dp
>
> David M. Porritt
> dporritt at smu.edu
>
>