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Four odontocete species change hearing levels when warned of impending loud sound
Author(s) -
NACHTIGALL Paul E.,
SUPIN Alexander Ya.,
PACINI Aude F.,
KASTELEIN Ronald A.
Publication year - 2018
Publication title -
integrative zoology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.904
H-Index - 34
ISSN - 1749-4877
DOI - 10.1111/1749-4877.12286
Subject(s) - phocoena , porpoise , sound exposure , audiology , beluga whale , sound (geography) , beluga , audiogram , bottlenose dolphin , biology , acoustics , hearing loss , fishery , medicine , ecology , physics , computer science , programming language , arctic , harbour
Hearing sensitivity change was investigated when a warning sound preceded a loud sound in the false killer whale ( Pseudorca crassidens ), the bottlenose dolphin ( Tursiops truncatus ), the beluga whale ( Delphinaperus leucas ) and the harbor porpoise ( Phocoena phocoena ). Hearing sensitivity was measured using pip‐train test stimuli and auditory evoked potential recording. When the test/warning stimuli preceded a loud sound, hearing thresholds before the loud sound increased relative to the baseline by 13 to 17 dB. Experiments with multiple frequencies of exposure and shift provided evidence of different amounts of hearing change depending on frequency, indicating that the hearing sensation level changes were not likely due to a simple stapedial reflex.