Publications
A browsable research list with local abstract previews, cleaner metadata, and faster scanning across methods, theory, and field systems.
ESPERDYNE - A Dual-Band Heterodyne Monitor and Ultrasound Recorder for Bioacoustic Field Surveys.
Umadi, Ravi · Methods in Ecology and Evolution
1. Background. Ultrasonic monitoring is essential for ecological studies of bats and other animals, yet high-performance field devices remain prohibitively expensive and inacces...
Widefield Acoustics Heuristic - Advancing Microphone Array Design for Accurate Spatial Tracking of Echolocating Bats
Umadi, Ravi · BMC Ecology and Evolution
Accurate three-dimensional localisation of ultrasonic bat calls is essential for advancing behavioural and ecological research. I present a comprehensive, open-source simulation...
WAH-i - Optimising Microphone Array Geometry for Customised Localisation Accuracy
Umadi, Ravi · bioRxiv
1. Accurate spatial localisation of free-flying echolocating bats is foundational for resolving fine-scale flight behaviour, prey interception, and spatial decision-making in na...
Rates, Ripples, and Responsivity - The Geometry of Echolocation in Water-Foraging Bats
Umadi, Ravi · Pre-published
Water-surface foraging is a rare strategy among echolocating bats, requiring precise coordination between sonar emission, echo timing, and flight geometry. Here, I develop a geo...
BATSY4-PRO - An Open-Source Multichannel Ultrasound Recorder for Field Bioacoustics
Umadi, Ravi · Under Review
1. Behavioural studies of acoustic communication in animals--particularly echolocating bats--require lightweight, power-efficient recording systems robust under field conditions...
Echolocation Dynamics in Active Foraging and Pursuit
Umadi, Ravi · TUM School of Life Sciences. Accepted and Awarded
Echolocating bats rely on self-generated biosonar signals to perceive and navigate their environments. While traditional models treat echolocation as a rigid, reflexive behaviou...
Probabilistic Sensory Constraints Shape Swarm Cohesion in Echolocating Bats
Umadi, Ravi · Under Review
1. Cohesive animal groups rely on continuous behavioural updating to regulate spacing, alignment, and collision avoidance, yet all sensory-guided interaction is constrained by f...
Temporal Feasibility Constraints on Wingbeat-Call Synchrony in Actively Echolocating Bats.
Umadi, Ravi · Under Review
1. Echolocating bats coordinate sound production, echo reception, and flight within a closed sensorimotor loop that operates under finite propagation delays and bounded response...
Biosonar Responsivity Sets the Stage for the Terminal Buzz
Umadi, Ravi and Firzlaff, Uwe · Under Review
Echolocating bats dynamically adjust their sonar signals during prey pursuit, yet the mechanistic limits that govern these rapid transitions have remained unclear. Here, we intr...
Oscillating Ears Dynamically Transform Echoes in Constant-Frequency Bats
Umadi, Ravi · Under Review
Constant-frequency (CF) bats exhibit rapid oscillations of their external ears. Yet, the functional role of these movements has remained unresolved since their initial documenta...
The Monumental Mistake of Evicting Bats from Archaeological Sites—A Reflection from New Delhi
Umadi, Ravi and Dookia, Sumit and Rydell, Jens · Heritage
We highlight the importance of an integrated management policy for archaeological monuments and the insect-eating bats that roost inside them. We refer to India, but the issue i...
Coordination Without Coupling - Flexible Sensorimotor Strategies in Phyllostomus discolor
Umadi, Ravi and Wiegrebe, Lutz and Wisniewska, Danuta M. and Peremans, Herbert and Firzlaff, Uwe · in preparation
Echolocating bats must coordinate signal emission and reception to successfully navigate complex acoustic environments. While most mouth-emitting vespertilionids exhibit tightly...
Dynamic Beam Shaping in Phyllostomus discolor Is Driven by Noseleaf Morphology
Umadi, Ravi and Wiegrebe, Lutz and Wisniewska, Danuta Maria and Jakobsen, Lasse and Firzlaff, Uwe · in preparation
The dynamic control of sonar beam geometry is a hallmark of biosonar systems, yet the mechanistic basis and functional consequences of this flexibility remain incompletely under...
Conditional Sequiturs - a Framework for Analyzing Hierarchical, Recursively Adaptive Sensory-Motor Systems
Umadi, Ravi · Draft Ready
Understanding complex biological systems requires frameworks that capture not only causal relationships but also the conditional, hierarchical, and recursive nature of events as...