[pianotech] inharmonicity in piano wire

[bppiano at aol.com]

 The question needs to be referrenced to a piano wire at rest and a piano wire in motion.? When a piano wire is in motion the actual tension of the wire flucuates from a position of rest to its maximum tension before it reverses direction in its wave loop times the number of partials counted.? I imagine that as the part of the wave slows down before it reverses is the determing factor for the enharmonicity.

I know that sounds like alot of words that poorly describes the myriad of actions that occur for every string that sounds as a part of a piano.? But, it clearly frames it in my mind.? I'm sure a pictoral representation would make it alot clearer.

Bruce Pennington


 


 

-----Original Message-----
From: reggaepass at aol.com
To: pianotech at ptg.org
Sent: Thu, 5 Feb 2009 9:32 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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