Changing Harmonicity

[gordon stelter]

Nope. The grooves cause the hammer to SLAP the sring,
rather than PUNCH it, creating all sorts of partial
excitation, while damping the fundamental and,
therefore, a "tinny" sound.  Plus, the felt at the
bottom of the grooves is quite hard, also exciting
upper partials. 
    In my previous example, the vibrations that create
the higher partials are more rapid than the
fundamental ( obviously ) and are damped at the end of
their traversal of the wire by the soft hammer
shoulders as the hammer "lingers" on the string longer
due to extra inertial mass. And the fundamental is
increased by the extra hammer mass as it pushes into
the wire and then rebounds in synchronicity with the
wire's movement, not just bouncing off it, causing
nice big waves, not "sizzles".
     It's all very scientific, of course!
     Professor Euphonious Thump
     ( and his Terpsichoral Ten )

 --- Michael Gamble <michael@gambles.fsnet.co.uk>
wrote:
> Hello List and Thump - his Theorem #2
> Here comes Gamble's Theory #1
> So there's all these grooves cut by the strings in
> yer hammer heads. Wow!
> Think of the damping of the higher partials that
> goes on before the hammer
> finally gets away from the strings....
> "Makes sense to me. The increased hammer weight
> increases the hammer's inertia, making it slower to
> rebound from the string. During that millisecond of
> increased string contact, the smaller segment
> vibrations imparted to the string, which create the
> higher harmonic partials, are somewhat damped by the
> effect of the pressing hammer felt.
>      ( Thump's Theorem #2 )
> Michael G (UK) - Everyone got their Easter Eggs yet?
> 
> 
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