Veselka et al. reply

Nina Veselka (), David D. McErlain, David W. Holdsworth, Judith L. Eger, Rethy K. Chhem, Matthew J. Mason, Kirsty L. Brain, Paul A. Faure and M. Brock Fenton ()
Additional contact information
Nina Veselka: Schulich School of Medicine and Dentistry, University of Western Ontario
David D. McErlain: Imaging Research Laboratories, Robarts Research Institute, Schulich School of Medicine and Dentistry, University of Western Ontario
David W. Holdsworth: Imaging Research Laboratories, Robarts Research Institute, Schulich School of Medicine and Dentistry, University of Western Ontario
Judith L. Eger: Royal Ontario Museum, 100 Queen’s Park, Toronto, Ontario M5S 2C6, Canada
Rethy K. Chhem: Medical University of Vienna
Matthew J. Mason: Development and Neuroscience, University of Cambridge
Kirsty L. Brain: Development and Neuroscience, University of Cambridge
Paul A. Faure: Neuroscience & Behaviour, McMaster University
M. Brock Fenton: Schulich School of Medicine and Dentistry, University of Western Ontario

Nature, 2010, vol. 466, issue 7309, E7-E7

Abstract: Abstract Replying to: U. Wittrock Nature 466, 10.1038/nature09156 (2010) Wittrock suggests that a stylohyal–tympanic connection in laryngeally echolocating bats as the one described in our study1could transmit laryngeal vibrations to both ears2. This could represent a ‘local oscillator’, forming part of a heterodyne-like detection system for precise target detection and localization. The essence of this exciting idea is that the externally transmitted echo (signal of interest) received by the ears would be mixed (multiplied) with an internally transmitted copy of the outgoing biosonar sound (reference signal) via vibrations of the stylohyal. The multiplicative mixing would generate two new signals—one at the sum and the other at the difference of the original inputs—and after low-pass filtering the remaining components would include a difference frequency signal that varied in its rate of amplitude modulation (AM). https://www.nature.com/articles/nature09156

Date: 2010
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DOI: 10.1038/nature09157

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