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The hum that helps to fight crime

nak.d - 2012-12-11 19:03

A hum that comes from mains electricity has allowed forensic scientists to establish whether recordings are genuine...


BBC News Link

plop - 2012-12-11 23:22

Interesting article, but the analysis assumes that the recording was performed at a location where there is a common national grid and in most situations this would be the case. Outlying places (eg Shetland islands) and countries without one need not apply.