spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Keating, A. W.
Right arrow Articles by Xie, D. H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Keating, A. W.
Right arrow Articles by Xie, D. H.

Journal of Experimental Biology, Vol 188, Issue 1 115-129, Copyright © 1994 by Company of Biologists

JOURNAL ARTICLES

Doppler-shift compensation by the mustached bat: quantitative data

AW Keating, OW Henson, MM Henson, WC Lancaster and DH Xie
Department of Cell Biology and Anatomy, University of North Carolina at Chapel Hill 27599.

Quantitative data for Doppler-shift compensation by Pteronotus parnellii parnellii were obtained with a device which propelled the bats at constant velocities over a distance of 12 m. The bats compensated for Doppler shifts at all velocities tested (0.1-5.0 ms-1). The main findings were (1) that compensation was usually accomplished by a progressive lowering of the approximately 61 kHz second harmonic constant-frequency component of emitted sounds in small frequency steps (93 +/- 72 Hz); (2) that the time needed to reach a steady compensation level averaged 514 +/- 230 ms and the number of pulses required to reach full compensation averaged 10.78 +/- 5.16; (3) that the animals compensated to hold the echo (reference) frequency at a value that was slightly higher than the resting frequency and slightly lower than the cochlear resonance frequency; (4) that reference frequency varied as a function of velocity, the higher the velocity of the animal, the higher was the reference frequency (slope 55 Hz m-1s-2); and (5) that the mean reference frequency was always an undercompensation. The average amount of undercompensation was 15.8%. There was a significant difference (P < or = 0.005) in Doppler-shift compensation data collected at velocities that differed by 0.1 ms-1. A velocity difference of 0.1 ms-1 corresponds to a Doppler-shift difference of about 35 Hz in the approximately 61 kHz signals reaching the ear.


This article has been cited by other articles:


Home page
 J. Neurophysiol.Home page
M. Vater, M. Kossl, E. Foeller, F. Coro, E. Mora, and I. J. Russell
Development of Echolocation Calls in the Mustached Bat, Pteronotus parnellii
J Neurophysiol, October 1, 2003; 90(4): 2274 - 2290.
[Abstract] [Full Text] [PDF]

Home page
 J. Exp. Biol.Home page
W. Metzner, S. Zhang, and M. Smotherman
Doppler-shift compensation behavior in horseshoe bats revisited: auditory feedback controls both a decrease and an increase in call frequency
J. Exp. Biol., June 1, 2002; 205(11): 1607 - 1616.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurosci.Home page
S. A. Leroy and J. J. Wenstrup
Spectral Integration in the Inferior Colliculus of the Mustached Bat
J. Neurosci., November 15, 2000; 20(22): 8533 - 8541.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
J. S. Kanwal, D. C. Fitzpatrick, and N. Suga
Facilitatory and Inhibitory Frequency Tuning of Combination-Sensitive Neurons in the Primary Auditory Cortex of Mustached Bats
J Neurophysiol, November 1, 1999; 82(5): 2327 - 2345.
[Abstract] [Full Text] [PDF]


© The Company of Biologists Ltd 1994