question re piezo devices

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Article #19097

#19097

From: Joe Hingston
Date: Wed, 27 Apr 1988 22:44

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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)

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Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!husc6!bbn!mit-eddie!ll-xn!ames!amdahl!pyramid!voder!apple!hingston
From: hingston@Apple.COM (Joe Hingston)
Newsgroups: sci.electronics
Subject: question re piezo devices
Message-ID: <9066@apple.Apple.Com>
Date: 27 Apr 88 22:44:58 GMT
Organization: Apple Computer Inc, Cupertino, CA
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