Abstract: An emergency alarm system peripheral, such as a hazard detector, intrusion detector, or a notification appliance, includes a base that is permanently installed on a wall or ceiling, and a head which mounts to the base. Various embodiments and methods are provided to easily and efficiently assign addresses to the peripherals in the system.

Abstract: The present invention relates to a voice alarm device which forms part of a fire alarm system loop. Upon detection of a fire, a control panel instructs appropriate voice alarm devices to retrieve relevant audio from local storage and output the audio via a local speaker.

Abstract: An emergency alarm system peripheral, such as a hazard detector, intrusion detector, or a notification appliance, includes a base that is permanently installed on a wall or ceiling, and a head which mounts to the base. Various embodiments and methods are provided to easily and efficiently assign addresses to the peripherals in the system.

Abstract: A gunshot detection system includes gunshot sensor units with microphones for detecting gunshots and capturing audio data depicting the detected gunshots and other ambient sounds, an environmental board with various environmental sensors for generating environmental data indicating environmental conditions. The audio data, environmental data, and position information can be stored locally on local nonvolatile storage of the gunshot sensor unit for later retrieval by law enforcement entities. In one embodiment, the gunshot sensor units include a wired and/or wireless data transfer interface for transferring the audio data, environmental data and/or position information to handheld units of law enforcement entities. The gunshot sensor unit can also stream live captured audio data for live monitoring by a control panel, and might also include speakers for providing audio playback of audio data from the control panel.

Abstract: An emergency alarm system peripheral, such as a hazard detector, intrusion detector, or a notification appliance, includes a base that is permanently installed on a wall or ceiling, and a head which mounts to the base. Various embodiments and methods are provided to easily and efficiently assign addresses to the peripherals in the system.

Abstract: A gunshot detection system synchronizes timing information across gunshot sensor units and/or a control panel. The gunshot sensor units exchange timing information with each other and/or with the control panel, which is then used by the gunshot sensor units to generate the event data for detected gunshot events. In one embodiment, the gunshot sensor units are configured as master and slave nodes. The master node periodically distributes a master time reference to the slave nodes, and the slave nodes calibrate local times based on the master time reference. The slave nodes can detect whether the current master node has become non-functional (e.g. based on a time elapsed since the most recently sent master time reference) and configure a new master node based on exchanging predetermined priority information for the slave nodes.

Abstract: A voice alarm notification device of a fire alarm system, comprising: a network port for receiving an alarm notification signal; an audio file library in which the audio files include audio voice message files; a speaker; a processor unit connected to the network port for processing an alarm notification signal and for selecting one of the audio files from the library to be played through the speaker; and a Bluetooth module for establishing a Bluetooth communication link to the voice alarm notification device, via which link an audio voice file can be received. The device is arranged to add the audio voice file received via the Bluetooth communication link to the library so as to be available for selection by the processor unit when it receives an alarm notification signal.

Abstract: An emergency alarm system peripheral, such as a hazard detector, intrusion detector, or a notification appliance, includes a base that is permanently installed on a wall or ceiling, and a head which mounts to the base. Various embodiments and methods are provided to easily and efficiently assign addresses to the peripherals in the system.

Abstract: A gunshot detection system detects shooting events within a premises and interacts with building management systems installed within the same premises to guide occupants to safety and/or obstruct or trap an active shooter. Gunshot sensor units detect the gunshots and generate event information based on the detected gunshots. A shooting event response module generates and sends building management instructions to the building management systems. In response, distributed devices of the building management systems perform effect changes within the premises according to the functionality of the distributed devices (e.g. locking/unlocking doors, turning off lights, flashing strobe lights). A control panel of the gunshot detection system presents a graphical user interface for presenting response options and receiving selections of response actions to be performed by the building management systems.

Abstract: A method and system for improving the intelligibility of an audio signal emitted from plural audio output devices in a space can help mitigate systems that have low intelligibility at installation due to reverberation effects; it can provide a quick post installation check of a system prior to a full-fledged STIPA (Speech Transmission Index for Public Address Systems) or equivalent test; and it allows for a quick verification if changes to the acoustical environment are expected to have major effects on STIPA tests.

Abstract: A fire alarm system design layout map is used in conjunction with a mobile computing device, an indoor tracking system and a connected services system to automate the process of determining the intended slave address for each slave device, assigning the slave address to the slave device, and verifying the assignment of the slave address to the slave device. The mobile computing device sends the location of a slave device to the connected services system, which maps the location to its corresponding position on the layout map and returns the intended slave address for that slave device. The slave address is assigned wirelessly to the slave device. The assignment of the slave address to the slave device is then verified by the connected services system.

Abstract: A smoke detector comprising an enclosure communicating with an external environment, within the enclosure a light source illuminating a detection volume in a first wavelength band and a light-sensor responding to light from the sensing volume in a second wavelength band. The detector is configured to sense photo-luminescent fire products, particularly polyaromatic compounds, and actuate an alarm when signal levels indicate a dangerous/fire condition is present. The photo-luminescence detector may be combined with optical scatter or other fire detectors to improve discrimination between fires and false alarm sources.

Abstract: A method of depassivating a battery may include receiving a determined state of the battery and applying, depending on the determined state, a depassivation algorithm to the battery. The algorithm may include applying a load across the battery for a predetermined amount of time that is dependent on the degree of battery passivation.

Abstract: A system includes participant nodes that unicast a voice stream to a master node and receive a multicast voice stream from the master node. The multicast voice stream may be a mixed voice stream mixing the voice streams of the participants. In this case, each participant performs echo cancellation on the multicast voice stream. Alternatively, the multicast voice stream may be a multiplexed voice stream multiplexing the voice streams of all participants. In this case, each participant de-multiplexes the multicast voice stream and generates a mixed voice stream that does not include that participant. Alternatively, the multicast voice stream received by each participant may be a multiplexed digital voice stream multiplexing multiple mixed streams including one mixed stream that does not include the voice stream of that participant. In this case, each participant de-multiplexes the multicast voice stream to obtain the mixed stream that does not include that participant.

Abstract: Aspects of the present disclosure provide addressable detection and alarm systems and methods for controlling a combined circuit by a control panel. In an example, a combined circuit may include one or more addressable initiating devices and one or more non-addressable notification appliances communicatively coupled with paired wires in parallel. The control panel may receive, on the paired wires, an indication of an anomaly from an addressable initiating device and transmit, on the paired wires, the alarm signal to the one or more addressable initiating devices and the one or more non-addressable notification appliances, wherein a first state of the alarm signal activates the one or more non-addressable notification appliances and deactivates the one or more addressable initiating devices, and wherein a second state of the alarm signal deactivates the one or more non-addressable notification appliances and activates the one or more addressable initiating devices.

Abstract: A fire detection system may include isolation circuit having an isolation switch coupled with a system line of the fire detection system and configured to isolate a first side of the system line from a second side of the system line. The isolation circuit may also include a controller coupled with the isolation switch. The controller may be configured to detect repetitive, intermittent short circuit activity on the system line and control the isolation switch based on this activity.

Abstract: An interface actuator device, an interface actuator system, and a system and method for remotely controlling an interface of a control panel are disclosed. The interface actuator device includes an actuator for controlling the interface of the control panel and an attachment mechanism for mounting the interface actuator device to the control panel. The system can further include a camera for capturing images of the interface and a mobile device for controlling the actuator and viewing the images from the camera.