Title

Experimental Studies on Echolocation Mechanisms in Bats

Date

1968

Index Abstract

Not Available

Photo Quality

Complete

Report Number

AMRL TR 67-192

Creator

Webster, Frederic A.

Brazier, Oliver G.

Corporate Author

Sensory Systems Laboratory

Laboratory

Aerospace Medical Research Laboratories

Extent

164

Identifier

AD0673373

Access Rights

Distribution of this document is unlimited. It may be released to the Clearinghouse, Department of Commerce, for sale to the general public.

Distribution Classification

1

Contract

AF 33(615)-2964

DoD Project

7233 - Biological Information Handling Systems and Their Functional Analogs

DoD Task

723302 - Biological Servomechanisms

DTIC Record Exists

No

Distribution Change Authority Correspondence

None

Distribution Conflict

No

Abstract

Comparative pursuit studies carried out on three species (Myotis lucifugus, Eptesicus fuscus and Lasiurus borealis) revealed similar tactics of pursuit and capture in Myotis and Eptesicus. Detection and localization capacities of Eptesicus appeared equal to the other species, but discrimination between spheres and mealworms proved highly variable, and the capacity to capture small targets inferior. Though the measured pursuit signals of the three species had definable differences, the phases of pursuit exhibited common characteristics, adequate for real-time machine identification, and thus usable for pursuit-controlled triggering of stimuli or recording equipment. Echoes returned by objects discriminated by bats have been studied by oscilloscope and human listening. Due to the number of relatively nonfluctuating echoes from mealworms (projected into a sound field of ultrasonic pulses), other details must provide essential clues for the bats' observed discriminations.

Report Availability

Full text available

Date Issued

1968-05

Provenance

RAF Centre of Aviation Medicine

Type

report

Format

1 online resource