On Sat, 5 Dec 1998, Graham Daniel wrote:

> CV joins on cars sometimes use a rubber disk/s along the shaft to absorb
> vibration, kind of like ringing a bell and then damping the ring by
> application of hand.   I am sure most of us could match piezos to much
> more useful tasks.

The nice part about piezo dampers is, that they have no moving parts, and
no hollows volumes in them, which makes producing them so much easier. I
strongly suspect that the baseball damper is of the new polymer piezo
kind, and I believe that more of this will be seen soon in tennis roquets
and other sports inplements. I could also see it used in small yacht's
booms and even sails and in small aircarft's thin aerodynamic surfaces. I
think that the piezo polymer can be laminated together with conductive
plastic to form a vibration-killing coating/mat that can be applied to
anything.

imho this is a very high tech use for the piezo effect.

Peter