Triggered wave generator/piezo questions

[Paul Perry]

At 04:57 PM 28/08/99 -0400, Terry Bowman, KA4HJH
>"The Mac Doctor" quoted & added:
>>Piezo's are really fragile, trying to get them to withstand the abuse of
>>drummer is tricky, but there's an easy (and low-tech) way to do it.
>As I recall, the ones PAiA had with their drum system were encapsulated.
>
I spoke to an acoustic engineer today (on a boat!) about home-made hydrophones.
He said encapsulate the piezo element in rubbery stuff (like windscreen sealant)
and then encapsulate the whole thing in epoxy or urethane. Having it
encapsulated
directly in very rigid material can make it breakable by sharp knocks.

paul perry melbourne australia (just back from the Warneet mangrove swamps)