AVR-Chat

I'm working on a big AVR project (a data radio) and need a
small "loud speaker" for occasional use (error checking
during setup, for example). 

So, does anyone know what the sound output transducers in
cellphones are called? I've looked in catalogs and have
found small tone makers, but no small voice-grade speakers.


Suggestions of where to look would be appreciated!
Jim, KA7EHK
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