Andreas Ruser, Michael Dähne, Abbo van Neer, Klaus Lucke, Janne Sundermeyer, Ursula Siebert, Dorian S Houser, James J Finneran, Eligius Everaarts, Jolanda Meerbeek, Rune Dietz, Signe Sveegaard, Jonas Teilmann
Testing the hearing abilities of marine mammals under water is a challenging task. Sample sizes are usually low, thus limiting the ability to generalize findings of susceptibility towards noise influences. A method to measure harbor porpoise hearing thresholds in situ in outdoor conditions using auditory steady state responses of the brainstem was developed and tested. The method was used on 15 live-stranded animals from the North Sea during rehabilitation, shortly before release into the wild, and on 12 wild animals incidentally caught in pound nets in Denmark (inner Danish waters)...
July 2016: Journal of the Acoustical Society of America