From Wired News, apparently Italian geophysicist Pietro Cosentino has been using sonic tomogopraphy to fingerprint wooden, ceramic, and stone objects. The non-invasive process records sonic vibrations after an object is struck with a small rubber hammer. The technology could have some interesting possible uses for identifying objects. There are a few potential hurdles though. First, the technology is extremely expensive. The sonic fingerprinting system costs between 15,000-20,000 Euros. Also, the sonic fingerprints change over time, so the process must be conducted regularly to be effective. There is also a risk of some less-than trustworthy individuals using the technology for false identification.
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