Clicking in shallow rivers: short-range echolocation of Irrawaddy and Ganges River dolphins in a shallow, acoustically complex habitat. [PDF]
PLoS ONE, 2013 Toothed whales (Cetacea, odontoceti) use biosonar to navigate their environment and to find and catch prey. All studied toothed whale species have evolved highly directional, high-amplitude ultrasonic clicks suited for long-range echolocation of prey in ...
Frants H Jensen +5 more
doaj +3 more sources
Range-dependent flexibility in the acoustic field of view of echolocating porpoises (Phocoena phocoena) [PDF]
eLife, 2015 Toothed whales use sonar to detect, locate, and track prey. They adjust emitted sound intensity, auditory sensitivity and click rate to target range, and terminate prey pursuits with high-repetition-rate, low-intensity buzzes.
Danuta M Wisniewska +7 more
doaj +2 more sources
Size constancy in bat biosonar? Perceptual interaction of object aperture and distance. [PDF]
PLoS ONE, 2013 Perception and encoding of object size is an important feature of sensory systems. In the visual system object size is encoded by the visual angle (visual aperture) on the retina, but the aperture depends on the distance of the object. As object distance
Melina Heinrich, Lutz Wiegrebe
doaj +3 more sources
Development of the hyolaryngeal architecture in horseshoe bats: insights into the evolution of the pulse generation for laryngeal echolocation [PDF]
EvoDevoBackground The hyolaryngeal apparatus generates biosonar pulses in the laryngeally echolocating bats. The cartilage and muscles comprising the hyolarynx of laryngeally echolocating bats are morphologically modified compared to those of non-bat mammals ...
Taro Nojiri +8 more
doaj +2 more sources
Interpreting How Neural Networks Infer Scatterer Geometry from Echolocation Echoes
Advanced Intelligent SystemsArtificial echolocation seeks to emulate biosonar for inferring shape (scatterer geometry) from acoustic echoes. Many promising approaches use convolutional neural networks (CNNs), but how these networks make decisions remains unclear, leaving model ...
Ganesh U. Patil +2 more
doaj +2 more sources
Deep Learning Methods for Assessing Time‐Variant Nonlinear Signatures in Clutter Echoes
Advanced Intelligent SystemsThe biosonar systems of bats in families of horseshoe and Old‐World leaf‐nosed bats include peripheral dynamics where the outer ears undergo fast rotations and deformations during echo reception.
Ibrahim Eshera +2 more
doaj +2 more sources
Impact of Biomimetic Pinna Shape Variation on Clutter Echoes: A Machine Learning Approach
Advanced Intelligent SystemsBats species navigating dense vegetation based on biosonar must obtain sensory information about their environments from “clutter echoes”, i.e., echoes that are superpositions from many unresolved reflecting facets (e.g., leaves) with unpredictable ...
Ibrahim Eshera +2 more
doaj +2 more sources
Frontiers in Marine ScienceUnderstanding cetacean echolocation behavior is important for effective population monitoring and conservation. Using passive acoustic monitoring (PAM), researchers can listen for the biosonar clicks produced by echolocating animals to estimate both ...
Randall Wells, Elena Papale
exaly +3 more sources
A computational model for biosonar echoes from foliage. [PDF]
PLoS ONE, 2017 Since many bat species thrive in densely vegetated habitats, echoes from foliage are likely to be of prime importance to the animals' sensory ecology, be it as clutter that masks prey echoes or as sources of information about the environment.
Chen Ming +4 more
doaj +5 more sources
The jamming avoidance response in echolocating bats [PDF]
Communicative & Integrative Biology, 2019 Bats face many sources of acoustic interference in their natural environments, including other bats and potential prey items that affect their ability to interpret the returning echoes of their biosonar signals.
Te K. Jones, William E. Conner
doaj +2 more sources