Show simple item record Muyshondt, Pieter G.G. Claes, Raf Aerts, Peter Dirckx, Joris J.J. 2017-10-12T16:19:15Z 2017-10-12T16:19:15Z 2017-11-15
dc.identifier doi:10.5061/dryad.fr684
dc.identifier.citation Muyshondt PGG, Claes R, Aerts P, Dirckx JJJ (2017) Sound attenuation in the ear of domestic chickens ( Gallus gallus domesticus ) as a result of beak opening. Royal Society Open Science 4(11): 171286.
dc.identifier.issn 2054-5703
dc.description Because the quadrate and the eardrum are connected, the hypothesis was tested that birds attenuate the transmission of sound through their ears by opening the bill, which potentially serves as an additional protective mechanism for self-generated vocalizations. In domestic chickens, it was examined if a difference exists between hens and roosters, given the difference in vocalization capacity between the sexes. To test the hypothesis, vibrations of the columellar footplate were measured ex vivo with laser Doppler vibrometry (LDV) for closed and maximally opened beak conditions, with sounds introduced at the ear canal. The average attenuation was 3.5 dB in roosters and only 0.5 dB in hens. To demonstrate the importance of a putative protective mechanism, audio recordings were performed of a crowing rooster. Sound pressures levels of 133.5 dB were recorded near the ears. The frequency content of the vocalizations was in accordance with the range of highest hearing sensitivity in chickens. The results indicate a small but significant difference in sound attenuation between hens and roosters. However, the amount of attenuation as measured in the experiments on both hens and roosters is small and will provide little effective protection in addition to other mechanisms such as stapedius muscle activity.
dc.relation.haspart doi:10.5061/dryad.fr684/1
dc.relation.isreferencedby doi:10.1098/rsos.171286
dc.subject avian ear
dc.subject middle ear vibrations
dc.subject laser Doppler vibrometry
dc.subject bird vocalizations
dc.subject audio recordings
dc.title Data from: Sound attenuation in the ear of domestic chickens (Gallus gallus domesticus) as a result of beak opening
dc.type Article
dc.contributor.correspondingAuthor Muyshondt, Pieter
prism.publicationName Royal Society Open Science

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