A motion sensor such as an accelerometer can be provided in wireless earbuds and/or the charging case for the earbuds. A wireless earbud can be placed on a table or floor and can remotely trigger an alarm if the accelerometer detects footsteps or disturbances nearby. This is useful for physical security in a hotel room or food establishment and can also generate an alert when the owner's attention is occupied in XR or is focused in a computer game.

The various implementations described herein include methods, devices, and systems for monitoring activity in a home environment. In one aspect, a method performed at a voice-assistant device includes: transitioning to operating in a second mode from a first mode; while operating in the second mode, detecting a sound; obtaining a determination as to whether the sound meets one or more monitoring criteria; and in accordance with a determination that the sound meets the one or more monitoring criteria, generating an alert or notification.

Techniques and systems are described for creating and operating a vibration triangulation network. The network can include vibration sensor devices placed in a building, such as a store or a house, which are able to pinpoint the location of a target, e.g., person, animal, etc., through triangulation. A described technique includes receiving vibration notifications from vibration sensor devices, determining a location of a target within the building based on at least a portion of the vibration notifications and a vibration sensor map associated with the building, and triggering an alarm event based on a detection of the target.

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. The shooting even response module also receives gunshot and building management event data and generates recommendation information based on the event data.

A gunshot detection system takes advantage of existing fire alarm system infrastructure by tapping a fire alarm communication network for a fire alarm system. Gunshot sensor units and/or a gunshot detection control panel receive power from the fire alarm communication network via tap units and/or tap wires, which provide electrical connectivity between the fire alarm communication network and the devices of the gunshot detection system. At the same time, the gunshot detection devices communicate via wireless links to an ancillary high-speed network. The gunshot sensor units can communicate with the fire alarm control panel via the fire alarm communication network. Even more comprehensive integration with the fire alarm system involves a hybrid gunshot detection and fire alarm control panel for controlling devices of both the gunshot detection system and the fire alarm system. Hybrid gunshot sensor units include fire detection elements such as smoke sensors and/or fire notification elements.

Methods are disclosed that, in some aspects, provide for the determination of alarm events or non-alarm events based on data received from various sensors monitoring one or more entry points of a premises. Non-alarm events may, for example, include a seismic event or a knock event. Determining whether the data received from the various sensors is an alarm or non-alarm event may be based on data received from two or more sensors monitoring two or more entry points of the premises. Further, data related to the non-alarm event that occurred at the premise may be compared to data related to non-alarm events that occurred at other premises and, based on the comparison, one or more authorities may be alerted to the non-alarm event.

A portable alarm system has a base unit including a processor electrically connected to a wireless transceiver configured to communicate wireless signals to an external location. The base unit is further configured to receive wireless alarm signals from at least a first sensor and a second sensor, both of the first and second sensors being physically separated from the base unit. The processor is configured to be selectively programmed by a user to cause the base unit to communicate with a remote monitoring station in response to receiving an alarm signal from the first sensor, but not in response to receiving an alarm signal from the second sensor. Instead, when an alarm signal is received from the second sensor, the processor causes a different action, other than communicating with the monitoring station, to occur. Such action can include, for example, sending a wireless communication to a mobile electronic device.

Method and system for detecting multiple alarms triggered by the same event and suppressing the duplicate detections, reducing false alarm rate. The first sensor to be activated is identified via a timestamp associated to the activation, then it is identified whether the other sensors have been activated by the same event. In particular a plurality of microphones is deployed in separate rooms to detect gunshots from firearms in a indoor setting.

Examples of systems and methods for locating movable objects such as carts (e.g., shopping carts) are disclosed. Such systems and methods can use dead reckoning techniques to estimate the current position of the movable object. Various techniques for improving accuracy of position estimates are disclosed, including compensation for various error sources involving the use of magnetometer and accelerometer, and using vibration analysis to derive wheel rotation rates. Various techniques utilize characteristics of the operating environment in conjunction with or in lieu of dead reckoning techniques, including characteristic of environment such as ground texture, availability of signals from radio frequency (RF) transmitters including precision fix sources. Navigation techniques can include navigation history and backtracking, motion direction detection for dual swivel casters, use of gyroscopes, determining cart weight, multi-level navigation, multi-level magnetic measurements, use of lighting signatures, use of multiple navigation systems, or hard/soft iron compensation for different cart configurations.

Devices, non-transitory computer-readable media and methods for providing a haptic signal based upon a detection of an object are disclosed. For example, the processor of a device may transmit a first ultrasonic signal via an ultrasonic emitter and detect an object based upon a receiving of a reflected signal via an ultrasonic detector, where the reflected signal comprises a reflection of the first ultrasonic signal from the object. The processor may further monitor for a second ultrasonic signal via the ultrasonic detector. The device may be associated with a user, and the second ultrasonic signal may be associated with a teammate of the user. The processor may also select whether to provide an instruction to a haptic actuator when the object is detected, based upon whether the second ultrasonic signal is received via the ultrasonic detector.