In-air and Underwater Hearing of Diving Birds

Sara Crowell Therrien
In-air and underwater auditory thresholds were measured in diving bird species, using behavioral and electrophysiological techniques. In the first set of experiments, the auditory brainstem response (ABR) was used to compare in-air auditory sensitivity across ten species of diving birds. The average audiogram obtained for each species followed the U-shape typical of birds and many other animals. All species tested shared a common region of greatest sensitivity, from 1000 to 3000 Hz. The audiograms differed...
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