Wireless recording of the calls of Rousettus aegyptiacus and their reproduction using electrostatic transducers.
Bioinspir Biomim
; 5(2): 026001, 2010 Jun.
Article
em En
| MEDLINE
| ID: mdl-20458135
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.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Espectrografia do Som
/
Telemetria
/
Transdutores
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Quirópteros
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Armazenamento e Recuperação da Informação
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Monitorização Ambulatorial
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Ecolocação
Limite:
Animals
Idioma:
En
Revista:
Bioinspir Biomim
Assunto da revista:
BIOLOGIA
/
ENGENHARIA BIOMEDICA
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
Reino Unido
País de publicação:
ENGLAND
/
ESCOCIA
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GB
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GREAT BRITAIN
/
INGLATERRA
/
REINO UNIDO
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SCOTLAND
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UK
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UNITED KINGDOM