Underwater psychophysical audiogram of a young male California sea lion (Zalophus californianus)

The Journal of the Acoustical Society of America
Jason MulsowJames J Finneran

Abstract

Auditory evoked potential (AEP) data are commonly obtained in air while sea lions are under gas anesthesia; a procedure that precludes the measurement of underwater hearing sensitivity. This is a substantial limitation considering the importance of underwater hearing data in designing criteria aimed at mitigating the effects of anthropogenic noise exposure. To determine if some aspects of underwater hearing sensitivity can be predicted using rapid aerial AEP methods, this study measured underwater psychophysical thresholds for a young male California sea lion (Zalophus californianus) for which previously published aerial AEP thresholds exist. Underwater thresholds were measured in an aboveground pool at frequencies between 1 and 38 kHz. The underwater audiogram was very similar to those previously published for California sea lions, suggesting that the current and previously obtained psychophysical data are representative for this species. The psychophysical and previously measured AEP audiograms were most similar in terms of high-frequency hearing limit (HFHL), although the underwater HFHL was sharper and occurred at a higher frequency. Aerial AEP methods are useful for predicting reductions in the HFHL that are potentially in...Continue Reading

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Citations

Apr 9, 2013·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Colleen ReichmuthBrandon L Southall
Sep 23, 2014·The Journal of the Acoustical Society of America·Kane A CunninghamColleen Reichmuth
Dec 7, 2014·The Journal of the Acoustical Society of America·Kane A CunninghamColleen Reichmuth
Nov 1, 2015·Hearing Research·Kane A Cunningham, Colleen Reichmuth
Dec 29, 2015·Marine Pollution Bulletin·Christine ErbeRobert Dooling
Nov 5, 2013·Marine Environmental Research·Dorian S HouserJames J Finneran
Dec 3, 2015·The Journal of the Acoustical Society of America·Jason MulsowJames J Finneran
Apr 5, 2017·The Journal of the Acoustical Society of America·Dorian S HouserJason Mulsow
Sep 6, 2018·The Journal of the Acoustical Society of America·Patchouly N BanksMark J Xitco
May 4, 2017·The Journal of the Acoustical Society of America·Brian K BranstetterKeith Jenkins
May 20, 2015·The Journal of Experimental Biology·Jillian M SillsColleen Reichmuth

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