Barn owls have 2-3 times poorer
spatial acuity in elevation than in azimuth (Bala, A. D. S, M.W. Spitzer,
T. T. Takahashi. 2007. Auditory spatial acuity approximates the
resolving power of space-specific neurons. PLOS One, 2(8), e675) Note
that the Bala et al paper is free online at the PLOS website.
Are you interested in absolute
localization (i.e., identifying the source location) or acuity (discriminating
between two locations)? You refer to both in your question. Absolute
localization and acuity are two different psychophysical measures of
localization abilities, but they need not be correlated (e.g., sounds yielding
good acuity may not be localized accurately).
See: Heffner H.E., Heffner R.S., Tollin
D.J., Populin L.C., Moore J.M., Ruhland J.L., Yin T.C.T. (2005) The
sound-localization ability of cats. J Neurophysiol. 94: 3653-3655 http://jn.physiology.org/cgi/content/full/94/5/3653
Daniel J. Tollin, PhD
University of Colorado
Department of Physiology and Biophysics/Mail Stop 8307
Research Complex 1-N, Rm 7120
12800 East 19th
PO Box 6511
Aurora, CO 80045
From: AUDITORY -
Research in Auditory Perception [mailto:AUDITORY@xxxxxxxxxxxxxxx] On Behalf Of Chris Clark
Sent: Wednesday, October 31, 2007
Subject: Re: animal sound
owls are passive locators - so be sure you differentiate between these two
... and you are asking about scientific
examples of such. FYI - There are observations of large whales
doing things - like counter-calling over long distances and then joining up -
that seem to have an explanation in this domain. Some of these have been
scientifically validated by playback experiments, but these are not able to
test vertical acuity. Whales also find food resources through either active or
passive acoustic localization in 3-space.
At 04:38 PM 10/30/2007, D.W. Smith wrote:
Tyto alba, the barn owl.
From: AUDITORY - Research in Auditory Perception
mailto:AUDITORY@xxxxxxxxxxxxxxx] On Behalf Of Brian Keith Branstetter
Sent: Tuesday, October 30, 2007 4:25 PM
Subject: animal sound localization
Are there any examples of an animal (besides a dolphin) who can localize
sound sources in the vertical plane with the same (or similar or better)
acuity as the horizontal plane?
Are there any references to such a finding?
Thank you in advance.
Navy marine mammal program
Christopher W. Clark, I.P. Johnson Director
Bioacoustics Research Program, Cornell Laboratory of Ornithology
Senior Scientist, Department of Neurobiology and Behavior
159 Sapsucker Woods Rd.