Animal Sonar pp 835-842 | Cite as

A Matched Filter Bank for Time Delay Estimation in Bats

  • Dieter Menne
Part of the NATO ASI Science book series (NSSA, volume 156)


Most bats possess a short frequency sweep as a component of their echolocation call, and it is widely accepted in neuroethology that this component is essential for range estimation. Neurons responding with short bursts to frequency sweeps could therefore be involved in range processing (Feng et al., 1978; Suga and O’Neill 1979; Pollak, 1980; Bodenhamer et al., 1979; Vater, 1981; O’Neill and Suga 1982). Many time-marking neurons fire with very little time jitter when a sweep passes through their characteristic frequency. A set of such neurons individually tuned to all frequencies of the fm-sweep make up a filter bank, and neurophysiologists often assume that the time information from this ensemble of filters, suitably averaged, is directly used by bats for time delay estimation.


Filter Bank Sweep Rate Inferior Colliculus Timing Error Frequency Sweep 
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Copyright information

© Plenum Press, New York 1988

Authors and Affiliations

  • Dieter Menne
    • 1
  1. 1.Department of Zoology NationalUniversity of SingaporeSingapore

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