"Patt" wrote in message
news:v79Jf.24359$B94.10978@pd7tw3no...
We need to monitor a section of an apartment building. Were only
interested
in detecting sound, for example someone breaking into a door. I`m
thinking
something like a baby monitor. Anyone know of that sort of thing but maybe
a
little more sophisticated. We are only interested in audio not a camera.
Thanks.
Patt

Burglar alarm audio sensor would do the job.

Some are only sensitive to breaking glass as an example