Evidence of overlacquered hammers

[Bernhard Stopper]

Hi Sarah,

Resilience or elasticity can be seen as complex parameter with pure
elasticity as real part and hysteretic damping as imaginary part.
They can have different size and must not be coupled, although in reality
there is always a certain relationship.

----- Original Message ----- 
From: "Sarah Fox" <sarah@graphic-fusion.com>
To: "Pianotech" <pianotech@ptg.org>
Sent: Saturday, October 02, 2004 5:49 PM
Subject: Re: Evidence of overlacquered hammers


> Hi Bernhard,
>
> > Let me refine what you call elasticity. What is going into heat is
defined
> > as damping or resilince and that occurs in the hammers felt as a
> > hysteretic
> > parameter function that means that the reaction force going into heat is
> > offset in time compared to the reaction force of the elasticity. The
real
> > elasticity is the springieness that rejects the felt compression.
>
> I'm not sure I understand what you've written.  (I do understand
hysteresis,
> of course.)  Are you saying that a "springier" hammer exhibits less
> hysteresis?  Also, I thought of "resilience" as synonymous with
> "springiness."
>
> > For everybody who is interested in trying out my scaling software that
> > includes a hammer/string physical model of both the string and hammer,
you
> > may download a demo of the software at:
> >
> > http://www.piano-stopper.de/dl/Mensurix_5.0.10.msi
>
> Cool!  I'll enjoy looking at this!  Thanks!  :-)
>
> Peace,
> Sarah
>
>
>
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