I reported previously (Nov 20) on Israeli startup 3DSignals. Its acoustic technology has detected a malfunction in a hydroelectric power station run by Italian company Enel. Early repair of the faulty oil valve saved Enel hundreds of thousands (if not millions) of Euros.
http://www.globes.co.il/en/article-3dsignals-helps-enel-power-co-spot-major-fault-1001172580