A system, device and method deploys one or more cameras secured to ground-based and/or aerial devices along with one or more gunshot detection units (GDUs) to monitor an event for threats. Visual and audible signals received by the cameras and GDUs are sent to a central controller, which analyzes the received threat communications and issues appropriate communications according to a response protocol over a secure wireless network to intended recipients, including security/law enforcement personnel and members of the public attending the event. In various embodiments, a high intensity light source is provided for emitting high intensity light in the direction of any located gunshots or other relevant threat.

A system, device and method deploys one or more cameras secured to ground-based and/or aerial devices along with one or more gunshot detection units (GDUs) to monitor an event for threats. Visual and audible signals received by the cameras and GDUs are sent to a central controller, which analyzes the received threat communications and issues appropriate communications according to a response protocol over a secure wireless network to intended recipients, including security/law enforcement personnel and members of the public attending the event. In various embodiments, a high intensity light source is provided for emitting high intensity light in the direction of any located gunshots or other relevant threat.

A system is configured to assist occupants of a building in response to an active shooter situation. A plurality of sensor units are arranged in the building to detect a gunshot and generate a signal indicative of the gunshot. A processing system determines an approximate location of the gunshot based on the signal and determines safe areas and unsafe areas in the building based on the approximate location of the gunshot. A plurality of output devices are in the building and in communication with the processing system. The output devices indicate an evacuation path within the safe areas with a first graphic and indicate the unsafe areas with a second graphic that is different from the first graphic. An indicator is arranged in a room and generates a lock down indication to notify occupants to stay in the room in response to the processing system receiving the signal.

A system is configured to assist occupants of a building in response to an active shooter situation. A plurality of sensor units are arranged in the building to detect a gunshot and generate a signal indicative of the gunshot. A processing system determines an approximate location of the gunshot based on the signal and determines safe areas and unsafe areas in the building based on the approximate location of the gunshot. A plurality of output devices are in the building and in communication with the processing system. The output devices indicate an evacuation path within the safe areas with a first graphic and indicate the unsafe areas with a second graphic that is different from the first graphic. An indicator is arranged in a room and generates a lock down indication to notify occupants to stay in the room in response to the processing system receiving the signal.

A system and method for acoustically detecting the firing of gunshots indoors employs multiple microphones (15, 20) which are utilized individually and in combination to detect sounds inside a building or other structure and, upon sensing a loud impulsive sound which is indicative of a gunshot, processing signals from both microphones (15, 20) to determine if the sound is that of a gunshot. The system and method relies on the acoustic signature of the noise as collected, with the acoustic signature being analyzed to arrive at values which are then compared to adjustable levels that signify a gunshot.

A system and method for acoustically detecting the firing of gunshots indoors employs multiple microphones (15, 20) which are utilized individually and in combination to detect sounds inside a building or other structure and, upon sensing a loud impulsive sound which is indicative of a gunshot, processing signals from both microphones (15, 20) to determine if the sound is that of a gunshot. The system and method relies on the acoustic signature of the noise as collected, with the acoustic signature being analyzed to arrive at values which are then compared to adjustable levels that signify a gunshot.

A system for determining a source location of a firearm discharge includes a plurality of monitoring stations and a central processing system. Each of the monitoring stations determines a time value of identification of a firearm discharge signature and transmits the time value. The central processing system 1) receives the time value from each of the monitoring stations; 2) determines, based on the time values, a geographic area that includes the source location of the firearm discharge; 3) determines a time of acoustic propagation from each of a plurality of randomly selected locations within the geographic area to each of the monitoring stations; 4) identifies the source location of the firearm discharge as the selected location for which difference in the time of acoustic propagation to each of the monitoring stations is closest to difference in the time values received from each of the monitoring stations.

A system for determining a source location of a firearm discharge includes a plurality of monitoring stations and a central processing system. Each of the monitoring stations determines a time value of identification of a firearm discharge signature and transmits the time value. The central processing system 1) receives the time value from each of the monitoring stations; 2) determines, based on the time values, a geographic area that includes the source location of the firearm discharge; 3) determines a time of acoustic propagation from each of a plurality of randomly selected locations within the geographic area to each of the monitoring stations; 4) identifies the source location of the firearm discharge as the selected location for which difference in the time of acoustic propagation to each of the monitoring stations is closest to difference in the time values received from each of the monitoring stations.

A heat transfer sensor includes a support body, a first thermocouple probe, a second thermocouple probe, and a third thermocouple probe. Each thermocouple probe is mounted to the support body and includes a hollow cylinder, a thermocouple, and an insulator. The thermocouple is mounted to an interior of the associated hollow cylinder and is configured to generate a first voltage based on a temperature of the associated hollow cylinder. The insulator is mounted between the associated hollow cylinder and the top wall. The first hollow cylinder has an emissivity 0.25. The second hollow cylinder has an emissivity 0.75. The third thermocouple probe has an emissivity that is >0.25 and <0.75 or measures a temperature of an environment surrounding the support body. A convective heat transfer and an incident radiation are computed using the first and second voltage and either the third voltage or the air temperature.

A heat transfer sensor includes a support body, a first thermocouple probe, a second thermocouple probe, and a third thermocouple probe. Each thermocouple probe is mounted to the support body and includes a hollow cylinder, a thermocouple, and an insulator. The thermocouple is mounted to an interior of the associated hollow cylinder and is configured to generate a first voltage based on a temperature of the associated hollow cylinder. The insulator is mounted between the associated hollow cylinder and the top wall. The first hollow cylinder has an emissivity 0.25. The second hollow cylinder has an emissivity 0.75. The third thermocouple probe has an emissivity that is >0.25 and <0.75 or measures a temperature of an environment surrounding the support body. A convective heat transfer and an incident radiation are computed using the first and second voltage and either the third voltage or the air temperature.