hammer/string interaction

[John Gunderson]

Stephen, I posted the original query with regard to high speed photography of a
hammer blow.  I'd be interested in knowing more about your computer model.  Do
you still have it?

John Gunderson, New Jersey Chapter

Stephen Birkett wrote:

> John G asked:
> > ...Is there any high
> > speed photography of a hamnmer blow.  If so please post where the results
> > and conclusions might be published.
> >
> Memories are short. I gave a talk about that topic in Dearborn at the CAUT
> forum. I presented a computer model of the hammer/string interaction, with
> various graphs showing the results of varying parameters like hammer mass,
> string tension etc. Computers have come a long way since then, and it
> could easily be made interactive, with slow motion video output to a
> computer screen, instant results of varying any of the critcal parameters
> - giving results similar to that famous video that everyone has heard of
> and no one has seen. It wouldn't take much to program the model output
> into some commercial animation softwar. I expect the slow motion results
> from the model will be very similar to the playback of that slow motion
> photgraphy film.
>
> There are quite a few journal articles published on the topic, if you are
> interested I ca supply some referecnes.
>
> Incidentally, if someone actually has the kimball video, why not convert
> to an mpeg and post somewhere to make it available.
>
> Stephen
>
> Stephen Birkett Fortepianos
> Authentic Reproductions of 18th and 19th Century Pianos
> 464 Winchester Drive
> Waterloo, Ontario
> Canada N2T 1K5
> tel: 519-885-2228
> mailto: birketts@wright.aps.uoguelph.ca