NDLI: Eavesdropping on echolocation: Recording the bat's auditory experience

Content Provider	IEEE Xplore Digital Library
Author	Austin, K.B. Moosman, P.R. Thomas, H.H.
Copyright Year	2011
Description	Author affiliation: Biology Department, Fitchburg State University, Fitchburg, MA 01402 (Thomas, H.H.) \|\| Biology Department, Virginia Military Institute, Lexington, VA 24450 (Moosman, P.R.) \|\| Computer Science Department, Fitchburg State University, Fitchburg, MA 01420 (Austin, K.B.)
Abstract	Insectivorous bats are able to locate and capture insects in complete darkness while flying at high speeds. They may consume hundreds of insects each night while avoiding obstacles in a complex environment. To investigate the processes associated with bat echolocation, we have developed instrumentation that allows us to record and visualize what a bat hears while flying through its natural environment. Recordings were made using a miniaturized radio telemetry system mounted directly on the back of the bat. This paper describes the design and testing of the components of this system, presents echolocation data collected from bats and discusses issues associated with the visualization and analysis of echoes recorded in a natural setting from the bat's point-of-view. It presents a new tool for visualizing a bat's experience by generating call sequence sonograms (CSSs) based on various signal parameters. CSSs based on time series amplitude, band-limited spectral magnitude and Q-factor are presented. This work demonstrates that CSSs based on Q-factor (computed by dividing a peak frequency estimate by a bandwidth estimate) provides a relatively clear representation of the objects producing echoes encountered by a bat during a continuous flight.
Starting Page	7682
Ending Page	7686
File Size	2265592
Page Count	5
File Format	PDF
ISBN	9781424441211
ISSN	1557170X
e-ISBN	9781457715891
e-ISBN	9781424441228
DOI	10.1109/IEMBS.2011.6091893
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-08-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Microphones Cascading style sheets Sonogram Wireless communication Visualization Time series analysis
Content Type	Text
Resource Type	Article
Subject	Signal Processing Biomedical Engineering Health Informatics Computer Vision and Pattern Recognition

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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