what can sharks hear with
According to the Shark Trust conservation organization, sharks hear sounds with frequencies ranging from 10 hertz to 800 hertz, and they are particularly responsive to sounds lower than 375 hertz. For comparison, 10 hertz is 1.5 octaves below the lowest note on a piano [source: PBS]. Humans, on the other hand, hear sounds ranging from 25 hertz to 16,000 hertz [source: Shark Trust]. Sharks can hear sounds much lower than we can, while we hear sounds much higher than sharks.
Powerful noses: Sharks use 'smell stereo' to detect odours. When the hunters experience such a lag, they will turn towards whichever side picked up the scent first, a new study has shown. The findings - published in Current Biology - help solve one of the long-standing mysteries of sharks.