Abstract
Stranded whales and dolphins have sometimes been associated with loud anthropogenic sounds. Echolocating whales produce very loud sounds themselves and have developed the ability to protect their hearing from their own signals. A false killer whale's hearing sensitivity was measured when a faint warning sound was given just before the presentation of an increase in intensity to 170 dB. If the warning occurred within 1-9 s, as opposed to 20-40 s, the whale showed a 13-dB reduction in hearing sensitivity. Warning sounds before loud pulses may help mitigate the effects of loud anthropogenic sounds on wild animals.
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