Results 11 to 20 of about 1,322 (144)

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, Alice Rocco, Rubaiyat M Mansur, Brian D Smith, Vincent M Janik, Peter T Madsen   +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, John M Ratcliffe, Kristian Beedholm, Christian B Christensen, Mark Johnson, Jens C Koblitz, Magnus Wahlberg, Peter T Madsen   +7 more
doaj   +2 more sources

Development of the hyolaryngeal architecture in horseshoe bats: insights into the evolution of the pulse generation for laryngeal echolocation [PDF]

EvoDevo
Background 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, Masaki Takechi, Toshiko Furutera, Nicolas L. M. Brualla, Sachiko Iseki, Dai Fukui, Vuong Tan Tu, Fumiya Meguro, Daisuke Koyabu   +8 more
doaj   +2 more sources

Interpreting How Neural Networks Infer Scatterer Geometry from Echolocation Echoes

Advanced Intelligent Systems
Artificial 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, Hyung‐Suk Kwon, Bogdan‐Ioan Popa   +2 more
doaj   +2 more sources

Impact of Biomimetic Pinna Shape Variation on Clutter Echoes: A Machine Learning Approach

Advanced Intelligent Systems
Bats 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, Sanmeel Lagad, Rolf Müller   +2 more
doaj   +2 more sources

Deep Learning Methods for Assessing Time‐Variant Nonlinear Signatures in Clutter Echoes

Advanced Intelligent Systems
The 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, Gaurav Duggal, Rolf Müller   +2 more
doaj   +2 more sources

The diel rhythms of biosonar behavior in the Yangtze finless porpoise (Neophocaena asiaeorientalis asiaeorientalis) in the port of the Yangtze River: The correlation between prey availability and boat traffic. [PDF]

PLoS ONE, 2014
Information on the habitat use of the critically endangered Yangtze finless porpoise (Neophocaena asiaeorientalis asiaeorientalis) is critical for its conservation.
Zhitao Wang, Tomonari Akamatsu, Kexiong Wang, Ding Wang   +3 more
doaj   +3 more sources

Drivers of Biosonar Click Rates in Bottlenose Dolphins (Tursiops truncatus) Over the West Florida Shelf

Frontiers in Marine Science
Understanding 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 ...
Frants H. Jensen, Randall S Wells, Elena Papale   +2 more
exaly   +3 more sources

Integration of Soft‐Robotics and Deep Learning to Assess the Coordinated Biosonar Emission and Reception Dynamics in Hipposiderid Bats

Advanced Robotics Research
Echolocating bat species with sophisticated biosonar systems such as the Old World leaf‐nosed bats (Hipposideridae) and horseshoe bats (Rhinolophidae) actively change the shapes of their ultrasound emission (“noseleaves”) and reception (“pinnae”) baffles
Shuxin Zhang, Ruihao Wang, Xiaoyan Yin, Luhui Yang, Rolf Müller   +4 more
doaj   +2 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