Security Business

JUN 2019

Find news and information for the executive corporate security director, CSO, facility manager and assets protection manager on issues of policy, products, incidents, risk management, threat assessments and preparedness.

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June 2019 / / Security Business 29 Acoustic Detection and Localization Most gunshot detection systems depend on acoustic sensors to detect when a gunshot or explosion occurs. Multiple acoustic sensors are used to detect the sound of a shot or explosion and alert local law enforcement and/or police dispatchers, effectively automating the initiation of a 911 telephone call. Security officers and other key personnel may receive a call or text notifying them of the event. According to Kathleen Griggs, President and CEO of Databuoy Corp., there are several different brands and kinds of acoustic gunshot detection systems available on the market today, with each offering a relatively unique kind of technology that is best-suited for specific environments. The range of each sensor differs, as does the technology used in each manufacturer’s version. A Databuoy sensor includes four acoustic “listeners” that help to both detect a shot and pinpoint the location of the shooter. Two sensors cover each area that needs to be secured and both sensors have to register a sound as a gunshot. “Our Shot Point gunshot detection system has a 100-percent shot detection rate because we use two sensors for each area,” Griggs explains. “The system can tell the difference between an echo, sound bounce and multiple shots.” When security officers are notified of an explosion or shooting, Databuoy’s “Know When It Counts” application software can help pinpoint the location of the shooter using acoustic data from the sensors and geometric calculations that provide the location of the bullet, origin and trajectory (see above). This information is transmitted to security officers and emergency responders so that they are better able to immobilize the shooter. Air Pressure Sensors Shot Tracer’s gunshot detection sensors, which are especially well-suited for the detection of small arms fire, use a specialized air pressure sensor and microphone to detect and locate gunshots. These sensors can detect shots that are fired, for example, from around a corner in a corridor or from inside a jacket. Shot Tracer’s Eagle AP indoor and Hawk outdoor sensors integrate with a facility’s existing alarm panel via contact closure outputs. When a shooting takes place, the sensors send an alert to the alarm panel and turn on the building alarm. A Verizon (or Vodaphone) data modem is built into A look at Louroe's Gunshot detection system. Shot Tracer's Eagle AP indoor gunshot detector. Databuoy's Shot Point uses multiple acoustic sensor nodes to detect and locate a gunshot, which then integrates with VMS or PSIM systems to cue the closest cameras to provide a visual. Illustration:Databuoy Photo: Louroe Electronics

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