Wireless recording of the calls of Rousettus aegyptiacus and their reproduction using electrostatic transducers
Whiteley, S M and Waters, D A and Hayward, G and Pierce, S G and Farr, I (2010) Wireless recording of the calls of Rousettus aegyptiacus and their reproduction using electrostatic transducers. Bioinspiration & Biomimetics, 5 (2). 026001. ISSN 1748-3182 (https://doi.org/10.1088/1748-3182/5/2/026001)
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Abstract
Bats are capable of imaging their surroundings in great detail using echolocation. To apply similar methods to human engineering systems requires the capability to measure and recreate the signals used, and to understand the processing applied to returning echoes. In this work, the emitted and reflected echolocation signals of Rousettus aegyptiacus are recorded while the bat is in flight, using a wireless sensor mounted on the bat. The sensor is designed to replicate the acoustic gain control which bats are known to use, applying a gain to returning echoes that is dependent on the incurred time delay. Employing this technique allows emitted and reflected echolocation calls, which have a wide dynamic range, to be recorded. The recorded echoes demonstrate the complexity of environment reconstruction using echolocation. The sensor is also used to make accurate recordings of the emitted calls, and these calls are recreated in the laboratory using custom-built wideband electrostatic transducers, allied with a spectral equalization technique. This technique is further demonstrated by recreating multi-harmonic bioinspired FM chirps. The ability to record and accurately synthesize echolocation calls enables the exploitation of biological signals in human engineering systems for sonar, materials characterization and imaging.
ORCID iDs
Whiteley, S M, Waters, D A, Hayward, G, Pierce, S G ORCID: https://orcid.org/0000-0003-0312-8766 and Farr, I;-
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Item type: Article ID code: 20213 Dates: DateEvent11 May 2010PublishedSubjects: Technology > Electrical engineering. Electronics Nuclear engineering Department: Faculty of Engineering > Electronic and Electrical Engineering Depositing user: Mr Alan Slevin Date deposited: 08 Jun 2010 13:32 Last modified: 12 Dec 2024 02:31 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/20213