Conditioned attenuation of dolphin monaural and binaural auditory evoked potentials after preferential stimulation of one ear

Finneran, James J.

doi:10.1121/10.0001033

Cited by 7 publications

(1 citation statement)

References 48 publications

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“…Auditory evoked potential (AEP) methods for testing hearing in odontocetes (toothed whales) are now regularly used in both research and clinical settings (e.g. Houser and Finneran, 2006b;Mooney et al, 2006;Popov et al, 2006;Houser et al, 2008;Finneran et al, 2013;Nachtigall and Supin, 2013;Finneran, 2020). The methods, which have become standardized in recent years (American National Standards Institute (ANSI), 2018), permit rapid acquisition of audiometric information without need for animal training and can be used in moribund and inattentive animals.…”

Section: Introductionmentioning

confidence: 99%

Audiograms and click spectra of seven novel and seldom-tested odontocetes

et al. 2022

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The use of auditory evoked potentials has been promoted as a means by which to collect audiometric information from odontocete cetaceans that are rarely encountered in stranding situations. This article presents the results of auditory evoked potential hearing tests collected from stranded odontocetes over nearly a decade. For six species, no audiograms previously existed – the dwarf sperm whale (Kogia sima), pygmy sperm whale (Kogia breviceps), northern right whale dolphin (Lissodelphis borealis), melon-headed whale (Peponocephala electra), long-beaked common dolphin (Delphinus capensis), and Atlantic spotted dolphin (Stenella frontalis). Additional hearing information was gathered for the pygmy killer whale (Feresa attenuata), a species for which only two prior audiograms had been collected. Audiograms for the delphinids demonstrated a typical dolphin-like form with upper-frequency limits of hearing > 149 kHz, except for the pygmy killer whales whose upper-frequency limit was between 103-107 kHz. The kogiid audiograms had a narrower region of increased sensitivity (80-128 kHz) closely aligned with their narrowband, high-frequency echolocation signals. Distinctions between kogiids and delphinids existed in the latencies of peaks of click-evoked auditory brainstem responses, with longer interwave intervals between P4 and N5 in the kogiids (mean of 0.60 ms vs. a mean of 0.37 ms in the delphinids). Modulation rate transfer functions collected in three of the species, suggested group-wide similarities in temporal processing capabilities.

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Section: Introductionmentioning

confidence: 99%

Audiograms and click spectra of seven novel and seldom-tested odontocetes

et al. 2022

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Forward masking in a bottlenose dolphin Tursiops truncatus: dependence on azimuthal positions of the masker and test sources

et al. 2022

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Forward masking was investigated by the auditory evoked potentials (AEP) method in a bottlenose dolphin Tursiops truncatus using stimulation by two successive acoustic pulses (the masker and test) projected from spatially separated sources. The positions of the two sound sources either coincided with or were symmetrical relative to the head axis at azimuths from 0 to ±90°. AEPs were recorded either from the vertex or from the lateral head surface next to the auditory meatus. In the last case, the test source was ipsilateral to the recording side, whereas the masker source was either ipsi-or contralateral. For lateral recording, AEP release from masking (recovery) was slower for the ipsi-than for the contralateral masker source position. For vertex recording, AEP recovery was equal both for the coinciding positions of the masker and test sources and for their symmetrical positions relative to the head axis. The data indicate that at higher levels of the auditory system of the dolphin, binaural convergence makes the forward masking nearly equal for ipsi-and contralateral positions of the masker and test.

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Introduction to the special issue on the effects of sound on aquatic life

Thomsen

Erbe

Hawkins

et al. 2020

The Journal of the Acoustical Society of America

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The effects of anthropogenic (man-made) underwater sound on aquatic life have become an important environmental issue. One of the focal ways to present and to share knowledge on the topic has been the international conference on The Effects of Noise on Aquatic Life (“Aquatic Noise”). The conferences have brought together people from diverse interests and backgrounds to share information and ideas directed at understanding and solving the challenges of the potential effects of sound on aquatic life. The papers published here and in a related special issue of Proceedings of Meetings on Acoustics present a good overview of the many topics and ideas covered at the meeting. Indeed, the growth in studies on anthropogenic sound since the first meeting in 2007 reflects the increasing use of oceans, lakes, rivers, and other waterways by humans. However, there are still very substantial knowledge gaps about the effects of sound on all aquatic animals, and these gaps lead to there being a substantial need for a better understanding of the sounds produced by various sources and how these sounds may affect animals.

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Conditioned attenuation of dolphin monaural and binaural auditory evoked potentials after preferential stimulation of one ear

Cited by 7 publications

References 48 publications

Audiograms and click spectra of seven novel and seldom-tested odontocetes

Audiograms and click spectra of seven novel and seldom-tested odontocetes

Forward masking in a bottlenose dolphin Tursiops truncatus: dependence on azimuthal positions of the masker and test sources

Introduction to the special issue on the effects of sound on aquatic life

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