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Showing 1 to 20 of 28 for “"biosonar"”.
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Spatial Audio for Bat Biosonar
… introduces spatial audio techniques to bat biosonar studies as a complementary method to the current TDOA based acoustical study methods. This work proposes a couple of feasible methods based on spatial audio techniques, that both track bats in flight and pinpoint the directions of echoes …
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Analysis of Bat Biosonar Beampatterns: Biodiversity and Dynamics
… actively deform their pinnae and noseleaf during biosonar operation. Both the pinnae and noseleaf act as acoustic baffles which interact with the outgoing and incoming sound; thus, they form an important interface between the bat and its environment. Beampatterns describe this interface as joint …
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Parsimonious Biosonar-Inspired Sensing for Navigation Near Natural Surfaces
Achieving autonomous in complex natural environments has the potential to transform society by bringing the benefits of automation from the confines of the factory floor to the outdoors. There, it could benefit areas such as environmental monitoring and clean-up, precision agriculture, delivery of …
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Biodiversity and dynamics of direction finding accuracy in bat biosonar
In the biosonar systems of bats, emitted acoustic energy and receiver sensitivity are distributed over direction and frequency through beampattern functions that have diverse and often complicated geometries. This complexity could be used by the animals to determine the direction of incoming sounds …
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Investigation of Dynamic Ultrasound Reception in Bat Biosonar Using a Biomimetic Pinna Model
… some bat species with particularly sophisticated biosonar systems, such as horseshoe bats (Rhinolophidae), the pinnae are characterized by static as well as dynamic geometrical features. Furthermore, bats from these species can deform their pinnae while the returning ultrasonic waves impinge on …
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Machine Learning Approaches for Biosonar Systems: Investigating Dynamic Sensing in Complex Natural Environments
… insights into the evolutionary pressures shaping biosonar systems. The work establishes machine learning as a powerful tool for uncovering subtle patterns in seemingly random biological signals. Methodologically, this research contributes to the growing intersection of deep learning and embodied …
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Biomimetic sonar design and the investigation of the role of peripheral dynamics for target classification in bat biosonar
The biosonar system of bats has many unique adaptations which allow for navigation in extremely cluttered environments. One such adaptation is the rapid motion of the pinna and noseleaf observed in certain families of old-world bats (Rhinolophidae and Hipposiderae). Little is known about the …
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Numerical analysis of bat noseleaf dynamics and its impact on the encoding of sensory information
Horseshoe bats possess a sophisticated biosonar system that helps them to negotiate complex unstructured environments by relying primarily on the sound as the far sense. For this, the bats emit brief ultrasonic pulses and listen to incoming echoes to learn about the environment. The sites of …
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Comparison of the Role of Beamwidth in Biological and Engineered Sonar
… it remains unclear to what extent engineered and biosonar follow similar design and operational principles. In the current work, the key sonar design characteristic of beamwidth is examined in technical and biosonar. To this end, beamwidth data has been obtained for 23 engineered sonar systems and …
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Location Finding in Natural Environments with Biomimetic Sonar and Deep Learning
… radar, and cameras. In this study, we applied a biosonar robot to navigate in a dense forest with bat-like FM-CF ultrasonic signals with deep learning. The results presented show that airborne biosonar can classify different areas' plants, in addition to achieving a similar level of navigation …
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Evaluation of a Simple Model for the Acoustics of Bat Swarms
Bats using their biosonar while flying in dense swarms may face significant bioacoustic challenges, in particular mutual sonar jamming. While possible solutions to the jamming problem have been investigated multiple times in literature, the severity of this problem has received far less attention. …
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Solutions to Passageways Detection in Natural Foliage with Biomimetic Sonar Robot
Numerous bats species have evolved biosonar to obtain information from their habitats with dense vegetation. Different from man-made sensors, such as stereo cameras and LiDAR, bats' biosonar has much lower spatial resolution and sampling rates. Their biosonar is capable of reliably finding narrow …
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Deep Learning-Driven Modeling of Dynamic Acoustic Sensing in Biommetic Soft Robotic Pinnae
Bats possess remarkably sophisticated biosonar systems that seamlessly integrate the physical encoding of information through intricate ear motions with the neural extraction and processsing of sensory information. While previous studies have endeavored to mimic the pinna (outer ear) dynamics of …
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The Role of Actively Created Doppler shifts in Bats Behavioral Experiments and Biomimetic Reproductions
… My findings indicate that these Doppler-based biosonar systems may be more complicated than previously thought because the animals can actively inject Doppler shifts into their input signals. The work in this dissertation presents a novel nonlinear principle for sensory information encoding in …
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Variability in the Pinna Motions of Hipposiderid Bats, Hipposideros Pratti
Bats are known for their highly capable biosonar systems which make them be able to navigate and forage in dense vegetation. Their biosonar system consists of one emitter (nose or mouth) and two receivers (ears). Some bat species, e.g. in the rhinolophid and hipposiderid families, have complicated …
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An engineering study into the bisonar system of fruitbats in the genus rousettus
The history of research into biosonar has a long and fascinating history, beginning with the documented experiments of Lazarro Spallanzani in the late 18th century. It was some 150 years before the mechanism of echolocation was to be demonstrated. Since that discovery, the acuity with which bats …
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Dynamic Emission Baffle Inspired by Horseshoe Bat Noseleaves
… of two key innovations - powered flight and biosonar - that are unique among mammals. Bats still outperform engineered systems in both capabilities by a large margin. Bat biosonar stands out for its ability to encode and extract sensory information using various mechanisms such as adaptive …
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Optimizing the Variability in the Deformation of a Biomimetic Pinna
Bats are noted for having extremely powerful biosonar systems that enable them to move through and hunt through the thick foliage. They have a single emitter (mouth or nose) and two receivers in their biosonar system (ears). Some bat species, such as those belonging to the group's rhinophid and …
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Exploratory Data Analysis using Clusters and Stories
… application domains, including studying the bat biosonar system and designing sustainable products. In the area of storytelling, we develop algorithms that can generate stories using distance, clique, and syntactic constraints. We explore the use of storytelling for studying document collections …
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Bat swarming as an inspiration for multi-agent systems: predation success, active sensing, and collision avoidance
… a cave and found that individual bat increased biosonar output as swarm size increased. The experimental finding indicated that individual bat acquired more sensory information in larger swarms even though there could be frequency jamming risk. In a simulation wherein we modeled bats flying …
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