1. In “Hidden Hearing Loss”, M. Charles Liberman reviews current knowledge about so-called temporary hearing loss. Recent research has shown that even though the hearing seems to return to normal, at least by conventional hearing tests, after intense high level noise exposure, there is permanent nerve damage. The so-called speech-in-noise tests, which measure the number of words correctly identified as the level of a background noise increase, can reveal the damage. He says there is a possibility of injecting nerve growth promoters to regrow nerve fibers as for example in the case of the victims of the Boston Marathon bombing which damaged the hearing of more than 100 spectators. Scientific American Au15.

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