I think you're talking about Piezo transducers? RadioShack has them,
for instance.
- Marcel

On 5/10/07, Clint Sharp <piclist@mit.edu> wrote:
> Help, what do you call the little modules that you find embedded in
> greeting cards that play bad tunes? I find myself in an odd situation
> where I may need about 20 of these but can't find them via Google
> because I can't think of a proper name for them.
> --
> Clint Sharp
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