Behavioural bioacoustics · active sensing · open projects
Understanding how animals sense, decide, and act through sound.
I am a behavioural bioacoustician and experimentalist, fascinated by how animals interact with their environment through sound. My work combines theory, experiments, field systems, and open-source projects to understand the structure of active sensing and behaviour.
Dr. Ravi Umadi
TUM School of Life Sciences
Technische Universität München
Freising, Germany
My doctoral research at the Technical University of Munich focused on echolocation dynamics in bats, particularly how they adapt their sonar system during active foraging and pursuit. I combined theoretical modelling, laboratory experiments with real-time virtual acoustic environments, and field studies to explore how bats modulate sound production, ear movements, and flight behaviour to optimise prey detection and capture.
A key part of my work has been developing new experimental and computational methods to study these processes, including ways to model and simulate acoustic interactions with dynamic morphology—such as moving ears or noseleaves—that shape auditory perception. This has allowed me to uncover new insights into emitter-receiver coordination and the sensory strategies bats use in complex environments.
Beyond my core work on bats, I am deeply interested in applying generative simulation and AI-based modelling to broader questions in sensory biology. I enjoy building projects that bridge biology, physics, and computation, and I am constantly driven by the challenge of understanding how living systems exploit physical laws to navigate and survive in the world.
Selected work
Research highlights
ESPERDYNE - A Dual-Band Heterodyne Monitor and Ultrasound Recorder for Bioacoustic Field Surveys.
1. Background. Ultrasonic monitoring is essential for ecological studies of bats and other animals, yet high-performance field devices remain prohibitively expensive a...
Widefield Acoustics Heuristic - Advancing Microphone Array Design for Accurate Spatial Tracking of Echolocating Bats
Accurate three-dimensional localisation of ultrasonic bat calls is essential for advancing behavioural and ecological research. I present a comprehensive, open-source ...
WAH-i - Optimising Microphone Array Geometry for Customised Localisation Accuracy
1. Accurate spatial localisation of free-flying echolocating bats is foundational for resolving fine-scale flight behaviour, prey interception, and spatial decision-ma...
Rates, Ripples, and Responsivity - The Geometry of Echolocation in Water-Foraging Bats
Water-surface foraging is a rare strategy among echolocating bats, requiring precise coordination between sonar emission, echo timing, and flight geometry. Here, I dev...
Projects
Methods, hardware, and open releases
Array WAH
Microphone array design and spatial localisation framework for bat bioacoustics and sensor-geometry exploration.
WAH-i
Iterative optimisation workflow for customised microphone-array geometry and volumetric localisation accuracy.
Esperdyne
Dual-band heterodyne monitor and ultrasound recorder designed for portable field bioacoustic surveys.
Latest from the blog
Long-form writing and project notes
The Making Of Esperdyne
Esperdyne, an open-source bat detector and recorder, is a fully open-source project by Ravi Umadi. The device implements unique features, such as simultaneous tuning t...
Why Do I Share What I Create?
I share my code and tools not just to comply with journals, but to contribute meaningfully. Science only moves forward when we share more than the polished results, wh...
Behind The Paper - Widefield Acoustics Heuristic
How a simple idea—simulating microphone arrays before building them—grew into the Array WAH toolkit, a method to map localisation accuracy for bat echolocation studies...
A Digital Metronome
A metronome makes and keeps the rhythm and is a most useful tool for any musician. For electronic projects involving music, a simple microcontroller-based metronome ca...