Results 131 to 140 of about 9,039 (182)

Reinforcement of the larynx and trachea in echolocating and non‐echolocating bats

Journal of Anatomy, 2020
AbstractThe synchronization of flight mechanics with respiration and echolocation call emission by bats, while economizing these behaviors, presumably puts compressive loads on the cartilaginous rings that hold open the respiratory tract. Previous work has shown that during postnatal development of Artibeus jamaicensis (Phyllostomidae), the onset of ...
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Neurobiology of echolocation in bats

Current Opinion in Neurobiology, 2003
Echolocating bats (sub-order: Microchiroptera) form a highly successful group of animals, comprising approximately 700 species and an estimated 25% of living mammals. Many echolocating bats are nocturnal predators that have evolved a biological sonar system to orient and forage in three-dimensional space.
Cynthia F, Moss, Shiva R, Sinha
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Propagation of beluga echolocation signals

Journal of the Acoustical Society of America, 1987
The propagation characteristics of high-frequency echolocation signals (peak energies above 100 kHz) of the beluga (Delphinapterus leucas) were measured while the animal performed a target detection task. The whale was trained to station on a bite plate so that its transmission beam could be measured in the vertical and horizontal planes using ...
Whitlow W L Au, Ralph H Penner, Charles W Turl   +2 more
exaly   +3 more sources

The evolution of echolocation in bats

Trends in Ecology & Evolution, 2006
(Uploaded by Plazi for the Bat Literature Project) Recent molecular phylogenies have changed our perspective on the evolution of echolocation in bats. These phylogenies suggest that certain bats with sophisticated echolocation (e.g. horseshoe bats) share a common ancestry with non-echolocating bats (e.g. Old World fruit bats).
Jones, Gareth, Teeling, Emma C.
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Investigations of mammalian echolocation

2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2009
Active echolocation is a sensory modality possessed by a variety of mammals and is used for the identification, classification and localization of objects. A multi stage model of the bat echolocation process has been used with recordings of rotated disks to plot frequency spectrums of the signals reaching each of the bats' ears. Recordings from objects
D S, Edwards, R, Allen, T, Papadopoulos, D, Rowan, S Y, Kim, L, Wilmot-Brown   +5 more
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Psychophysics of Human Echolocation

2013
The skills of some blind humans orienting in their environment through the auditory analysis of reflections from self-generated sounds have received only little scientific attention to date. Here we present data from a series of formal psychophysical experiments with sighted subjects trained to evaluate features of a virtual echo-acoustic space ...
Sven, Schörnich, Ludwig, Wallmeier, Nikodemus, Gessele, Andreas, Nagy, Michael, Schranner, Daniel, Kish, Lutz, Wiegrebe   +6 more
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The Oilbird: Hearing and Echolocation

Science, 1979
Oilbirds can navigate in total darkness by echolocation. The sound energy in their sonar cries is unevenly distributed over the range from about 1 to 15 kilohertz, with a dominant frequency range of 1.5 to 2.5 kilohertz. This corresponds to the most sensitive range of their hearing as determined by neurophysiological methods.
Konishi, Masakazu, Knudsen, Eric I.
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Duration tuning in the auditory midbrain of echolocating and non-echolocating vertebrates

Journal of Comparative Physiology A, 2011
(Uploaded by Plazi for the Bat Literature Project) Neurons tuned for stimulus duration were first discovered in the auditory midbrain of frogs. Durationtuned neurons (DTNs) have since been reported from the central auditory system of both echolocating and nonecholocating mammals, and from the central visual system of cats.
Riziq, Sayegh, Brandon, Aubie, Paul A, Faure   +2 more
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Target Discrimination by the Echolocation of Bats

Science, 1964
AbstractMyotis lucifugus first learned to catch mealworms mechanically projected into the air in a laboratory flight room, and were then trained to distinguish mealworms from small metal or plastic disks (3.0 × 12.5 mm and 0.5 × 6.3 mm). These three targets were presented singly in a semi‐random sequence, traveling along very similar trajectories.
D R, GRIFFIN, J H, FRIEND, F A, WEBSTER
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Laryngeally echolocating bats

Nature, 2010
Echolocation of bats is a fascinating topic with an ongoing controversy regarding the signal processing that bats perform on the echo. Veselka et al. found that bats that use the larynx for producing the echolocating ultrasound have a stylohyal bone that connects the larynx to the auditory bulla. I propose that the stylohyal bone is used for heterodyne
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