Key Takeaways
- Hall Lidar Inc. unveiled the UDL‑64 (Ultimate Drone Listener), its first‑generation acoustic drone‑detection system made entirely in the United States.
- The platform provides real‑time 3D situational awareness without emitting any signals, making it covert and resistant to spoofing or jamming.
- Edge‑based AI processes data from a high‑density microphone array, using beamforming and trained acoustic models to isolate drone rotor signatures from background noise.
- A single unit detects drones up to 200 m; a networked configuration extends coverage to roughly 500 m with full 3‑D tracking (location, speed, altitude, classification).
- The system is rugged, weather‑resistant, has no moving parts, and can be powered by battery, solar, or mains, enabling rapid deployment in mobile or fixed‑site roles.
- Designed for discretion and flexibility, it suits airports, critical infrastructure, public venues, and any scenario where low‑observable detection is essential.
Company Announcement and Product Overview
Hall Lidar Inc., a U.S.‑based developer of advanced sensing and counter‑UAS technologies, announced on April 15, 2026 the launch of its acoustic drone‑detection system, the UDL‑64 (Ultimate Drone Listener). The press release positioned the device as a “first‑generation” solution that delivers real‑time 3‑D situational awareness in complex operational environments. By emphasizing that the system is wholly designed, engineered, and manufactured in the United States, Hall Lidar highlighted supply‑chain security, compliance with federal procurement standards, and a high level of trust for government and commercial customers.
Core Technology: Acoustic Sensing Advantages
The UDL‑64 operates independently of radio‑frequency (RF) signals, GPS, or visual conditions, emitting no detectable emissions itself. This passive approach makes the system covert to adversaries and immune to electronic spoofing or jamming, which can compromise radar or RF‑based detectors. Acoustic signatures generated by drone rotors are intrinsic to the aircraft’s mechanical operation and cannot be masked in the same way as electronic signals, providing a uniquely resilient detection modality. The release noted that as drone threats grow more autonomous and stealthy, traditional sensors often falter, whereas acoustic sensing offers a fundamental alternative.
AI‑Driven Signal Processing
At the heart of the UDL‑64 is a high‑density microphone array coupled with edge‑based artificial intelligence. The system continuously captures spatial sound data and applies real‑time beamforming techniques to isolate and track aerial threats within defined sectors. Trained acoustic models classify drones by their distinct rotor signatures while filtering out environmental noise such as wind, traffic, or urban activity. When multiple units are networked, they collaborate to triangulate positions, enabling full three‑dimensional tracking of targets across an expanded coverage area. An optional integrated optical module can be added for visual confirmation, creating a layered sensing approach without revealing the acoustic sensor’s location.
Physical Design and Durability
The sensor array is housed within a specialized structure that enhances sound capture and directionality, all enclosed in a rugged, weather‑resistant shell that does not impede acoustic sensitivity. With no moving parts, the platform is inherently durable and suited for long‑term deployment in harsh environments, including extreme temperatures, moisture, and dust. The design prioritizes acoustic performance while maintaining a low profile, making the unit suitable for discreet installations where visibility must be minimized.
Deployment Flexibility and Power Options
Measuring roughly 24 inches in diameter, the UDL‑64 is compact and lightweight, allowing rapid mounting on a tripod, mast, or existing infrastructure. Setup can be completed in under a minute for mobile units, supporting quick‑reaction forces, while also accommodating longer‑term fixed‑site installations. Power flexibility includes battery, solar, or external mains inputs, ensuring operation in off‑grid or austere locations. Integrated connectivity options—Wi‑Fi, Bluetooth, and 5G—enable seamless integration into broader command‑and‑control architectures, allowing data to be fused with other sensors or shared with higher‑level situational‑awareness systems.
Detection Range and Networked Capabilities
In standalone mode, a single UDL‑64 unit can detect drones at distances up to 200 meters. When multiple units are deployed in a network, their collaborative processing extends effective coverage to approximately 500 meters, providing persistent, three‑dimensional situational awareness across a defined area. The networked configuration delivers precise tracking data, including target location, speed, altitude, and classification, which can be used for threat assessment, cueing of interceptors, or triggering of mitigations.
Operational Use Cases
Hall Lidar emphasized that the system was engineered with real‑world missions in mind. It serves rapidly deployable mobile teams—such as event security or disaster‑response units—as well as fully integrated, fixed defenses for critical infrastructure. Ideal applications include protecting civilian airports, power generation facilities, transportation hubs, stadiums, and other public venues where discretion and reliable detection are paramount. The small form factor and low observable nature make the UDL‑64 especially valuable for covert monitoring scenarios where revealing a sensor’s presence could compromise operations or alert adversaries.
Company Background and Leadership
Hall Lidar Inc. focuses on advanced sensing and counter‑UAS solutions to safeguard critical infrastructure, national‑security assets, and public spaces. Founder and chief scientist David Hall, a serial inventor with more than 100 patents, was honored as the 2018 Inventor of the Year by the Smithsonian Foundation. His expertise spans LIDAR, acoustics, marine stabilization, electromagnetic propulsion, and AI‑enabled detection and neutralization systems. Under his leadership, Hall Lidar aims to combine innovative engineering with multi‑sensor intelligence to redefine how aerial threats are identified and mitigated.
Contact Information and Further Details
For pricing, delivery schedules, and additional technical specifications, interested parties are directed to visit https://halllidar.com/. Press inquiries can be addressed to [email protected]. The full press release and multimedia assets are available via the PRNewswire link provided in the announcement.
This summary distills the essential points of the Hall Lidar press release into a comprehensive overview suitable for readers seeking a clear understanding of the UDL‑64 acoustic drone‑detection system, its technological advantages, deployment flexibility, and potential applications.