Re: piezo film transducers

[Hans Lindauer <hans@ernieball.com>]

Carsten,

A piezo film sensor is made using a type of polymer called
Polyvinylidene fluoride, which can be made into thin sheets or cables. 
The sensitivity is 10 times that of piezoceramics, and they have a crazy
frequency response (.001-10^9 Hz).

For waterphones, piezo film sensors can be easily made waterproof and
have an acoustical impedance closer to water than ceramic materials have
(2.6 times versus 11 times).

Check out the Technical Manual in the link below for all the specs.

-Hans

p.s.  Alex - thanks for the Digikey tip.


> Subject: Re: piezo film transducers
> Date: Thu, 10 Oct 2002 15:04:45 +0200
> From: Carsten Wegener <carsten@tyfoo.de>
> To: <Loopers-Delight@loopers-delight.com>
> 
> am 04.10.2002 22:14 Uhr schrieb Alex Stahl unter alex@pixar.com:
> 
> > You can get smaller quantities from Digikey. www.digikey.com
> >
> >> Here's a link to some piezo film sensors.  I suspect that these may
> >> be the same type used by Pick-Up the World in their pickups.
> >> Unfortunately, there's a $100 minimum order.  That's the same price
> >> as a single pickup from Pick-Up the World, but it will buy you a LOT
> >> of pickups.  They make great gifts.
> >>
> >> http://www.msiusa.com/piezo_download_listing.htm
> >>
> >>
> >> Cheers,
> >>
> >> -Hans
> >
> What is a piezo film-sensor? Is it just a normal ceramic-piezo or 
>something
> different? What about the sound and the sensetivity?
> Thanks carsten