Results 151 to 160 of about 2,249 (202)
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Biosonar and Neural Computation in Bats
Scientific American, 1990It used to be a common misconcep tion that bats' use of sound puls es to navigate and locate prey is a crude system, the acoustic equivalent of feeling one's way in the dark with a cane. But biosonar has since been shown to be anything but crude: an echolocating bat can pursue and cap ture a fleeing moth with a facility and success rate that would ...
Nobuo Suga
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Determining biosonar images using sparse representations
The Journal of the Acoustical Society of America, 2009Echolocating bats are thought to be able to create an image of their environment by emitting pulses and analyzing the reflected echoes. In this paper, the theory of sparse representations and its more recent further development into compressed sensing are applied to this biosonar image formation task.
Fontaine, Bertrand, Peremans, Herbert
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The Journal of the Acoustical Society of America, 1999
Capabilities of bats to analyze spectral profiles have been demonstrated by several researchers. However, suggestions as to the informational content of the biologically accessible features in terms of the echo-generating process are not yet entirely convincing.
Rolf Müller, Roman Kuc
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Capabilities of bats to analyze spectral profiles have been demonstrated by several researchers. However, suggestions as to the informational content of the biologically accessible features in terms of the echo-generating process are not yet entirely convincing.
Rolf Müller, Roman Kuc
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Cetacean biosonar and noise pollution
Europe Oceans 2005, 2005Noise pollution in the marine environment is an emerging but serious concern. Its implications are less well understood than other global threats and largely undetectable to everyone but the specialist. In addition, the assessment of the acoustic impact of artificial sounds in the sea is not a trivial task, certainly because there is a lack of ...
M. Andre +3 more
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Biosonar-inspired technology: goals, challenges and insights
Bioinspiration & Biomimetics, 2007Bioinspired engineering based on biosonar systems in nature is reviewed and discussed in terms of the merits of different approaches and their results: biosonar systems are attractive technological paragons because of their capabilities, built-in task-specific knowledge, intelligent system integration and diversity.
Rolf, Müller, Roman, Kuc
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Cepstral processing for bat biosonar
The Journal of the Acoustical Society of America, 2006Bats routinely discriminate multiple glint targets whose interglint time spacings are much less than the integration time of the bat auditory system. This suggests that the bats are exploiting spectral cues in the received echos to resolve the glints. Closely spaced glints cause notches and peaks in the received signal spectrum with frequency spacings ...
John R. Buck +2 more
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Biosonar navigation above water II: exploiting mirror images
Journal of Neurophysiology, 2015As in vision, acoustic signals can be reflected by a smooth surface creating an acoustic mirror image. Water bodies represent the only naturally occurring horizontal and acoustically smooth surfaces. Echolocating bats flying over smooth water bodies encounter echo-acoustic mirror images of objects above the surface.
Genzel, D. +4 more
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Biosonar navigation above water I: estimating flight height
Journal of Neurophysiology, 2015Locomotion and foraging on the wing require precise navigation in more than just the horizontal plane. Navigation in three dimensions and, specifically, precise adjustment of flight height are essential for flying animals. Echolocating bats drink from water surfaces in flight, which requires an exceptionally precise vertical navigation.
Hoffmann, S. +6 more
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MCM trials with Biosonar system
Proceedings of Meetings on Acoustics, 2013In this paper we present the results of MCM trials using a Biosonar system mounted on the AUV (autonomous underwater vehicle) REMUS 100. The trials were run in Lochearnhead in Scotland. Two mine-like objects were put on the seafloor. The first one was a aluminium cylinder (150 cm long and 40 cm diameter) and the second object was a truncated cone ...
Yan Pailhas, Chris Capus, Keith Brown
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Why hipposiderid biosonar is worth studying
The Journal of the Acoustical Society of America, 2017Although the genus Hipposideros contains a diverse set of more than 70 species of echolocating bats, the biosonar system of this group has received far less attention than that of the related horseshoe bats (family Rhinolophidae) which share the same basic cf-fm biosonar.
Rolf Müller +4 more
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