Files and links (2)
Published (Version of Record)CC BY V4.0, Open Access
Journal article
Time-varying auditory gain control in response to double-pulse stimuli in harbour porpoises is not mediated by a stapedial reflex
Biology Open, Vol.6(4), pp.525-529
2017
Abstract
Echolocating animals reduce their output level and hearing sensitivity with decreasing echo delays, presumably to stabilize the perceived echo intensity during target approaches. In bats, this variation in hearing sensitivity is formed by a call-induced stapedial reflex that tapers off over time after the call. Here, we test the hypothesis that a similar mechanism exists in toothed whales by subjecting a trained harbour porpoise to a series of double sound pulses varying in delay and frequency, while measuring the magnitudes of the evoked auditory brainstem responses (ABRs). We find that the recovery of the ABR to the second pulse is frequency dependent, and that a stapedial reflex therefore cannot account for the reduced hearing sensitivity at short pulse delays. We propose that toothed whale auditory time-varying gain control during echolocation is not enabled by the middle ear as in bats, but rather by frequency-dependent mechanisms such as forward masking and perhaps higher-order control of efferent feedback to the outer hair cells.
Details
- Title
- Time-varying auditory gain control in response to double-pulse stimuli in harbour porpoises is not mediated by a stapedial reflex
- Authors/Creators
- A.E.M. Schrøder (Author/Creator) - Aarhus UniversityK. Beedholm (Author/Creator) - Aarhus UniversityP.T. Madsen (Author/Creator) - Murdoch University
- Publication Details
- Biology Open, Vol.6(4), pp.525-529
- Publisher
- The Company of Biologists
- Identifiers
- 991005546010407891
- Murdoch Affiliation
- School of Veterinary and Life Sciences
- Language
- English
- Resource Type
- Journal article
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
Metrics
134 File views/ downloads
78 Record Views
InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Domestic collaboration
- International collaboration
- Citation topics
- 3 Agriculture, Environment & Ecology
- 3.35 Zoology & Animal Ecology
- 3.35.796 Marine Mammal Ecology
- Web Of Science research areas
- Biology
- ESI research areas
- Biology & Biochemistry