[sci.electronics] question re piezo devices

hingston@Apple.COM (Joe Hingston) (04/28/88)

I have several dumb questions regarding piezo-electric transducers.
I am considering using one in place of a loudspeaker in a future design.
What drive characteristics do they typically have?  voltage? current?
impedance?  Do they need to be driven a their resonant frequency?  Are they
good only for buzzers, or can they also handle voice?
I am attracted by their size and price, but don't know too much else about
them.  Thanks for any info.
-- 
Joe Hingston            "A screaming comes across the sky"
Apple Computer, Inc.
(world!amdahl!apple!hingston)