> > i want to use a buzzer instead of a simple speaker
> > to play some voices or even some short musical fragments.
>
> You haven't said why you want to use a "buzzer" - I'm suspecting
> small size and physical robustness, in which case you still have a
> lot of options that seem to be called "speakers."  Here's a good
> selection:
> http://www.goldmine-elec-products.com/products.asp?dept=1217

I want to use it in a speaking toy, the volume should be ok for a
range of 2, 3 meters. I checked the link above and i only wish there
was something like this available for my country because the prices
are great. They only ship the goods in US os a few other countries.

> In general one seems to trade off frequency response for volume;
> assuming you're willing to put up with the sort of volume and tone of
> a typical cell phone ring (which isn't so bad these days), there are

You are right, the speakers from a "mp3 ringing-toned phone"
is more than ok considering the fair volume and good signal quality.
I will try to order some items from the distributors of spare mobile
phones parts and see how are they performing.
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist