Gunshot detection technologies play a critical role in modern security strategies, enabling faster responses to incidents in schools, public venues, and events. While these systems differ in form—such as fixed, portable, or wearable devices—they are defined by the underlying technologies powering their functionality. Here’s a closer look at the three main types of gunshot detection technologies: acoustic sensors, infrared/visual AI, and combined audio-visual systems.
1. Acoustic Sensor-Based Detection
Overview
Acoustic sensor-based gunshot detection systems are among the most widely used solutions, leveraging sound analysis to detect and identify gunfire.
How It Works
When a gun is fired, it creates a distinct acoustic signature, including a muzzle blast and ballistic shockwave. Acoustic sensors capture these sounds, and sophisticated algorithms analyze their frequency, intensity, and duration to verify whether the noise is gunfire. Systems like CGIT’s FireFLY use acoustic technology powered by photocell-tapped AC power from streetlights, ensuring consistent, long-term operation for urban and event environments.
Applications
– Cities with integrated safety networks
– Fixed installations in schools, campuses, and corporate environments
– Temporary event monitoring
Advantages
– Highly reliable in detecting gunfire in various settings
– Provides real-time alerts with precise geolocation
– Low false positive rates due to advanced sound filtering
Limitations
– Acoustic-only systems may struggle in environments with overlapping noise
– Requires proper sensor placement for maximum effectiveness
– May need multiple units for large-scale coverage
2. Infrared and Visual AI-Based Detection
Overview
Infrared and visual AI gunshot detection systems use optical sensors to detect muzzle flashes and other visual indicators of gunfire, offering an added layer of confirmation beyond sound.
How It Works
When a gun is fired, it produces a muzzle flash, which can be detected by infrared and optical cameras. These systems rely on AI algorithms to analyze live video feeds, identifying flashes, weapon movements, or suspicious activity. Systems like ZeroEyes specialize in real-time AI-powered monitoring through existing video surveillance networks, providing actionable intelligence immediately after gunfire detection.
Applications
– High-security areas such as government facilities or airports
– Open-air venues with clear sightlines
– Sites requiring integrated video monitoring
Advantages
– Provides visual confirmation alongside detection
– Reduces false positives by verifying sound data with visual input
– Effective in controlled environments with minimal obstructions
Limitations
– Limited performance in low-visibility conditions, such as heavy fog or smoke
– Requires advanced camera systems, increasing costs
– Dependent on clear sightlines for maximum effectiveness
3. Combined Audio-Visual Detection Systems
Overview
Combined systems integrate acoustic and visual AI technologies, offering a comprehensive solution that maximizes detection accuracy and minimizes false alarms.
How It Works
These systems first detect gunfire acoustically, analyzing the sound signature for confirmation. Once identified, the system activates nearby cameras to visually assess the scene. Systems like Raven by Flock Safety combine acoustic sensors with license plate recognition and video feeds, enabling security teams to track suspects and vehicles in real time.
Applications
– Large public events like concerts, festivals, and sporting events
– Urban environments with high ambient noise
– Critical infrastructure and large corporate campuses
Advantages
– Combines the strengths of audio and visual detection for unmatched accuracy
– Offers geolocation and video verification in real time
– Ideal for environments with overlapping sound and complex layouts
Limitations
– Higher installation costs due to dual-technology setup
– Requires robust infrastructure and network connectivity
– May involve longer deployment times for complex integrations
Making the Right Choice
The effectiveness of gunshot detection depends not only on the form factor (fixed, portable, or wearable) but also on the underlying technology:
– Acoustic Systems: Ideal for broad coverage in environments where sound patterns are clear and consistent.
– Infrared/Visual AI Systems: Best for high-security locations where virtual verification is a priority.
– Combined Audio-Visual Systems: Suitable for environment where sound and sight together can provide comprehensive monitoring.
By understanding the capability and limitations of each technology, organizations can choose the best solution to protect people and assets effectively.
Discover How CGIT’s FireFLY Can Transform Your Security
CGIT’s FireFLY sets the standard for portable, acoustic gunshot detection technology. Powered by innovative features like photocell-tapped AC power and precise real-time alerts, FireFLY is designed to meet the unique security challenges of events, urban environments, and beyond. Contact CGIT today to learn how FireFLY can elevate your security strategy and help create safter spaces for everyone.