UAV Detection Using Infrasound: The Power of SIS-1 Infrasound Sensors

Silent Threats Demand Silent Detection

As unmanned aerial vehicles (UAVs) — or drones — become increasingly common in both civilian and military airspace, the need for reliable long-range UAV detection systems has never been greater. Conventional radar and optical systems face limitations in complex terrain or adverse weather. That’s where infrasound sensing technology comes in.

The SIS-1 Infrasound Sensor offers a cutting-edge approach to detecting and tracking UAVs using low-frequency acoustic waves, providing continuous, all-weather surveillance that complements existing radar or visual systems.

What Is Infrasound and Why It Works for UAV Detection

Infrasound refers to sound waves below the threshold of human hearing — typically below 20 Hz. These low-frequency waves can travel long distances and penetrate obstacles like hills, forests, and buildings.

Every UAV or drone produces a unique acoustic signature due to its propellers, engines, and aerodynamic behavior. The SIS-1 sensor detects these subtle infrasound emissions and distinguishes them from natural background noise through advanced filtering and signal processing.

This allows operators to identify, locate, and track drones even when they are invisible to the naked eye or radar — including small UAVs flying at low altitudes or beyond line of sight.

The SIS-1 Advantage

The SIS-1 Infrasound Sensor is purpose-built for field and defense applications requiring high sensitivity, low noise, and energy-efficient performance.

⚙️ Key Features

  • Detection Range: 0.1 Hz – 50 Hz (−3 dB bandwidth)
  • High Sensitivity: 2.5 – 3.5 mV/Pa for faint UAV signatures
  • Ultra-Low Noise: Below the Low Noise Model (LNM) under 1 Hz
  • Low Power Draw: < 5 mA @ 12 V — ideal for solar-powered systems
  • Compact & Lightweight: 156 mm diameter, 67 mm height, 850 g
  • Rugged Design: Operational between −20 °C and +60 °C
  • Differential Output: For scalable multi-node detection networks

These specifications make SIS-1 perfect for deployment in permanent arrays, tactical mobile units, and long-term border installations.

Applications Across Defense and Security

QuakeLogic’s infrasound technology enables multiple use cases in national security and surveillance:

  • UAV Detection & Tracking: Identify acoustic signatures of drones up to several kilometers away.
  • Border Surveillance: Monitor unauthorized aerial movements in restricted zones.
  • Explosion & Gunshot Detection: Detect and locate blasts or weapon discharges in real time.
  • Multi-Hazard Monitoring: Integrate with environmental sensors for seismic, volcanic, and atmospheric observation.
  • Smart Sensor Networks: Combine multiple SIS-1 units to form synchronized arrays for precise triangulation and trajectory calculation.

Easy Integration & Deployment

Each SIS-1 sensor is equipped with standard differential output and low-voltage operation, enabling direct integration with QuakeLogic dataloggers, signal processors, and visualization software. The system can be configured for:

  • Real-Time UAV Acoustic Detection
  • Automatic Threat Classification
  • Event Recording and Remote Data Streaming

Combined with wind-noise reduction systems, SIS-1 delivers clear and reliable infrasound data even in challenging environments.

Why Choose QuakeLogic for UAV Detection

QuakeLogic brings decades of experience in seismic, infrasound, and structural monitoring systems to the defense and research sectors. The SIS-1 sensor reflects our commitment to precision engineering, reliability, and ease of deployment.

When integrated into your existing defense or border infrastructure, the SIS-1 becomes a force multiplier — adding a silent, passive detection layer capable of identifying aerial threats in all conditions.

Ready for Mission-Critical Monitoring

From UAV surveillance and perimeter protection to scientific field studies, SIS-1 is the trusted choice for organizations that demand uncompromised performance.

Click Here to Learn More About SIS-1

📩 Contact us today to learn how the SIS-1 Infrasound Sensor can strengthen your defense and UAV detection capabilities.

QuakeLogic Moho UNO: The Compact Seismograph That Delivers Big Results

Meet Moho UNO

When it comes to seismic monitoring, reliability and ease of use matter. That’s why QuakeLogic created the Moho UNO — a compact, single-component seismograph designed for professionals, researchers, and organizations who need accurate seismic data without the hassle.

The Moho UNO combines professional-grade performance with a simple, plug-and-play design. Whether you’re running an earthquake early warning system, monitoring structural health, or conducting academic research, this device makes advanced seismic monitoring more accessible than ever.

Why Moho UNO Stands Out

  • ✅ Compact & Portable – Lightweight and easy to transport.
  • ✅ Quick Deployment – Set it up in minutes, not hours.
  • ✅ High Sensitivity – Detects even the smallest ground motions.
  • ✅ Flexible Working Modes – DataStreamer, Seedlink, Win2SDR, EwExport.
  • ✅ Robust Design – Built with IP65-rated protection for reliability in the field.
  • ✅ Real-Time Data – Streams seismic data in miniSEED format for professional use.
  • ✅ Affordable – Professional-level performance at a cost that fits research and institutional budgets.

Practical Applications

The Moho UNO is already helping professionals around the world with:

  • Earthquake Early Warning Systems – Deliver alerts faster and improve community safety.
  • Structural Health Monitoring – Monitor dams, bridges, and buildings for vibrations and stress.
  • Shake Intensity Research – Collect high-quality data for academic and government studies.
  • Education & Training – Universities and labs can use Moho UNO as an affordable teaching tool.

Easy to Use

Forget about complex installations. With its built-in Wi-Fi connectivity and web-based interface, you can:

  • Configure the device quickly.
  • View live waveform graphs from any browser.
  • Connect through TCP/UDP or SSH for advanced setups.
  • Level and deploy the unit in minutes with its adjustable feet and bubble level.

Technical Highlights

  • Input Channels: 1 (CH1)
  • ADC: 24-bit Delta-Sigma (Cirrus Logic CS5532)
  • Sample Rates: 50 / 100 / 200 SPS【58†source】
  • Gain Settings: 2, 4, 8, 16, 32, 64
  • Data Formats: miniSEED, Earthworm, WinSDR【58†source】
  • Enclosure: IP65, PLA material
  • Dimensions: 142 × 134 × 55 mm
  • Weight: ~410–470 g (depending on sensor)【59†source】
  • Power Consumption: Less than 2 W【58†source】

Why Choose QuakeLogic

QuakeLogic has over 15 years of expertise in seismic technology and hazard monitoring. With the Moho UNO, you get:

  • A proven, reliable instrument.
  • Strong customer support.
  • Compatibility with global standards (MiniSEED, SeedLink, Earthworm).
  • A tool trusted by professionals across industries.

Conclusion

The Moho UNO isn’t just a seismograph — it’s a smarter way to monitor, research, and protect against earthquakes and vibrations. Compact, powerful, and affordable, it’s the perfect choice for institutions, engineers, and researchers.

👉 Ready to upgrade your seismic monitoring?

Compact. Reliable. Research-Grade.
MOHO UNO makes seismic monitoring simple, affordable, and network-ready. Contact us today for pricing. 

Detecting Noise Harassment with Smart Airborne Acoustic Monitoring

Noise harassment—whether from persistent loud neighbors, industrial operations, or environmental disturbances—can have serious impacts on health and well-being. Chronic exposure to unwanted sound is linked to stress, anxiety, insomnia, and reduced concentration.

While traditional noise complaints rely on subjective reporting, advances in airborne acoustic monitoring now provide a precise, verifiable way to identify and document noise harassment events.

What Is Airborne Acoustic Monitoring?

Airborne acoustic monitoring is the process of capturing and analyzing sound waves traveling through air using highly sensitive microphones and sensors. Unlike simple sound level meters, these systems:

  • Continuously record noise levels in real time.
  • Detect specific patterns and frequencies associated with harassment or nuisance sounds.
  • Store and analyze historical data, creating a digital record for verification.

This makes the technology particularly useful for communities, workplaces, and legal authorities dealing with ongoing noise disputes.

Why Use Acoustic Monitoring for Noise Harassment?

1. Objective Evidence
Instead of relying solely on personal accounts, acoustic monitoring provides time-stamped, quantifiable data on noise events.

2. Continuous Surveillance
Systems can run 24/7, ensuring no event goes undocumented, even at night when disturbances are most disruptive.

3. Pattern Recognition
Advanced software can differentiate between normal background noise and intentional harassment, including:

  • Repetitive banging or thumping
  • High-frequency tones designed to irritate
  • Amplified music or speech targeted at neighbors

Introducing the QuakeLogic AIR Infrasound Monitor

For clients seeking a professional-grade solution, QuakeLogic proudly offers the AIR Infrasound Monitor. This advanced system is purpose-built for detecting and analyzing both audible noise and infrasound (below human hearing range), making it uniquely powerful for identifying subtle or intentionally disruptive harassment sources.

Key Advantages of AIR

  • High-precision infrasound detection to capture low-frequency signals often missed by conventional microphones.

Whether for residents facing noise harassment, municipalities enforcing regulations, or industries monitoring compliance, AIR provides verifiable data.

Why QuakeLogic?

At QuakeLogic, we specialize in advanced monitoring solutions for seismic, vibration, and acoustic. Our AIR Infrasound Monitor represents the cutting edge of noise harassment detection—bridging the gap between traditional sound level meters and intelligent, cloud-connected monitoring systems.

Conclusion

Noise harassment is more than an inconvenience—it’s a public health issue. With the right tools, individuals, communities, and organizations can detect, document, and resolve noise disputes effectively. QuakeLogic’s AIR Infrasound Monitor transforms subjective complaints into actionable evidence, empowering a healthier, quieter future.

Learn more about the AIR Infrasound Monitor here

👉 Take control of your environment today. Explore the AIR Infrasound Monitor and empower your community with the evidence needed to ensure a healthier, quieter future.