Avian interaural canal enhances interaural delay

Calford M.B. and Piddington R.W. (1988) Avian interaural canal enhances interaural delay. Journal of Comparative Physiology A, 162 4: 503-510. doi:10.1007/BF00612515


Author Calford M.B.
Piddington R.W.
Title Avian interaural canal enhances interaural delay
Journal name Journal of Comparative Physiology A   Check publisher's open access policy
ISSN 0340-7594
Publication date 1988
Sub-type Article (original research)
DOI 10.1007/BF00612515
Volume 162
Issue 4
Start page 503
End page 510
Total pages 8
Publisher Springer-Verlag
Subject 2802 Behavioral Neuroscience
2800 Neuroscience
2737 Physiology (medical)
1314 Physiology
1103 Clinical Sciences
Abstract Using a simple model of the birds' binaural pressure difference acoustic receivers it was predicted that the interaural delay achieved by birds at low frequencies is far greater than that of mammals with a similar head-size. This was upheld when interaural delay was recorded, between the cochlear microphonics, for six species. Stimulus positions were varied over the azimuthal range from the frontal midline to the interaural axis. Predicted delays were frequency dependent (higher frequency, smaller delay), as were the actual delays, and the magnitude of the measured delays were comparable with predictions. Delays measured at high frequencies were close to those expected from pathlength around the head, but delays measured at low frequencies could be more than three times this expectation. This finding raises the possibility that interaural delay may be a useful localization cue in birds, even for those species with very small heads, since the large delays at low frequencies are sufficient to provide a physiological cue to azimuth.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import
 
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Created: Tue, 26 Jul 2016, 03:59:10 EST by System User