Not sure if this is common knowledge among ARSCers. It's new to me.
Refer to: http://www.unknowncountry.com/news/?id=5153
"The video you can view by clicking on lier la video in this link
contains sounds that have been derived by analyzing the grooves laid
on a piece of pottery that was made at Pompeii over 2,000 years ago.
There are words and, amazingly, human laughter. It's not a joke, but a
serious archaeological effort. It seems that pottery all over the
world contains sound in its groves, picked up naturally as the pots
were made, in much the same way that an old wax recording was made."
The short sound clip derived from the pottery groove is amazing.
Not sure if anyone can make out the words spoken, but the laughter
is clearly discernable.
I see a whole new field emerging of trying to recover sounds recorded
into various types of objects, both man-made and even natural. (If
anyone is interested here, let me know -- I'd be interested in working
on such a project -- the ultimate audio forensics.)