[pianotech] inharmonicity in piano wire

[Phil Frankenberg]

It's my understanding that the ends of the speaking length of the wire are stiffer than the rest, which results in  imperfect partials. I'm sure someone can explain this better than I or correct me if I'm wrong.

Phil Frankenberg
CSUChico
Chico, Ca.
  ----- Original Message ----- 
  From: reggaepass at aol.com 
  To: pianotech at ptg.org 
  Sent: Thursday, February 05, 2009 8:32 AM
  Subject: [pianotech] inharmonicity in piano wire


  List, 


  I just received a query from a science faculty member at the art institute where I work.  He asks how can it be that partials of piano wire are sharp of what they "should" be?  I told him that my very pedestrian understanding is that this phenomenon is due to the high tension of piano wire up to pitch, but that is just me repeating what I have heard "somewhere."  Is this response even close to being correct?  Any further clarification as to why this is would be much appreciated all the way around.


  Thanks,


  Alan Eder
  CalArts


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