The underwater audiogram of the West Indian manatee (Trichechus manatus).

  title={The underwater audiogram of the West Indian manatee (Trichechus manatus).},
  author={E R Gerstein and Lindsey Gerstein and Stephen E Forsythe and J. Ellen Blue},
  journal={The Journal of the Acoustical Society of America},
  volume={105 6},
The hearing thresholds of two adult manatees were measured using a forced-choice two alternative paradigm and an up/down staircase psychometric method. This is the first behavioral audiogram measured for any Sirenian, as well as the first underwater infrasonic psychometric test with a marine mammal. Auditory thresholds were obtained from 0.4 to 46 kHz, and detection thresholds of possible vibrotactile origin were measured at 0.015-0.2 kHz. The U-shaped audiogram demonstrates an upper limit of… CONTINUE READING


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