Systems, apparatuses and methods are provided herein for monitoring stock information in a shopping space. A system for monitoring stock information in a shopping space comprises: a support structure configured to hold a plurality of items in the shopping space, a sound emitter device configured to produce a sound in response to a movement of at least one of the support structure and an item placed on the support structure, and a sound sensor configured to capture a sound produced by the sound emitter device and transmit the sound produced by the sound emitter device to a stock tracking system.

A system and a method, as well as a positioning and wearable devices for determining the distance and position of devices communicating with each other over a medium, the system, are disclosed. At least one remote device comprises first processing unit, at least one transmitter functionally connected to the first processing unit and adapted to transmit signals over a medium, and at least one receiver functionally connected to the first processing unit and adapted to receive signals over said medium. At least two wearable devices, each comprising a second processing unit and wireless communication means capable of receiving and sending data signals over said medium, are also provided. The remote device is adapted to determine the distance to at least two wearable devices, to determine the direction to said at least two wearable devices based on at least two different bearings taken from said at least one remote device to each wearable device, to calculate the position of said at least two wearable devices relative to the remote device, and to communicate the position of at least one first wearable device to a second wearable device. The wearable devices are adapted to process the position of a first wearable device in their processing unit and to present to the user of a second wearable device an indication of direction and distance to said first wearable device.

Systems and methods are presented for detecting a direction of an incoming projectile and determining a source location of the projectile. One or more resonant sensors (comprising a plate, piezo electric sensor, etc.) can be arranged, where shockwaves from the projectile (e.g., shockwaves from a bullet travelling at supersonic speeds) are incident upon the plate and cause the plate to resonate. The resonance causes an electrical signal to be generated by the piezo electric sensor (e.g., a piezo electric film sensor), the greater the degree of resonance in the plate, the higher the magnitude of signal generated by the piezo electric sensor. By comparing the magnitude of the piezo electric signals across the array of resonant sensors it is possible to determine a trajectory of the projectile and hence a location of the source of the projectile. Acoustic waves can also be generated by muzzle waves.

Systems and methods are presented for detecting a direction of an incoming projectile and determining a source location of the projectile. One or more resonant sensors (comprising a plate, piezo electric sensor, etc.) can be arranged, where shockwaves from the projectile (e.g., shockwaves from a bullet travelling at supersonic speeds) are incident upon the plate and cause the plate to resonate. The resonance causes an electrical signal to be generated by the piezo electric sensor (e.g., a piezo electric film sensor), the greater the degree of resonance in the plate, the higher the magnitude of signal generated by the piezo electric sensor. By comparing the magnitude of the piezo electric signals across the array of resonant sensors it is possible to determine a trajectory of the projectile and hence a location of the source of the projectile. Acoustic waves can also be generated by muzzle waves.

A method of determining, by an electronic device, an audio event is disclosed. The method may include receiving an input sound from a sound source by a plurality of sound sensors. The method may also extracting, by a processor, at least one sound feature from the received input sound, determining, by the processor, location information of the sound source based on the input sound received by the sound sensors, determining, by the processor, the audio event indicative of the input sound based on the at least one sound feature and the location information, and transmitting, by a communication unit, a notification of the audio event to an external electronic device.

A method, system, and computer-readable media for collecting blast exposure data relating to a blast exposure event from one or more blast sensors and performing a blast exposure analysis that results in identifying the source of the blast exposure event using the blast exposure data. The one or more blast sensors may be communicatively coupled to at least one user device. Such a blast exposure analysis is provided in response to the blast exposure event such that operators may be notified of the blast exposure in real-time.

A method, system, and computer-readable media for collecting blast exposure data relating to a blast exposure event from one or more blast sensors and performing a blast exposure analysis that results in identifying the source of the blast exposure event using the blast exposure data. The one or more blast sensors may be communicatively coupled to at least one user device. Such a blast exposure analysis is provided in response to the blast exposure event such that operators may be notified of the blast exposure in real-time.

An acoustic sensing system and method includes at least one cluster of acoustic sensors in communication with a computing device. The computing device is configured to process received acoustic signals, and provide at least one of detection of the acoustic source presence; determination of direction of arrival of an acoustic wave emitted by an acoustic source; and classification of the acoustic source as to its nature. The cluster may include at least two sensors and the computing device may be configured to process the received acoustic signals and provide localization of the acoustic source in three dimensions. The cluster of acoustic sensors may comprise at least one seismic wave sensor.

An acoustic sensing system and method includes at least one cluster of acoustic sensors in communication with a computing device. The computing device is configured to process received acoustic signals, and provide at least one of detection of the acoustic source presence; determination of direction of arrival of an acoustic wave emitted by an acoustic source; and classification of the acoustic source as to its nature. The cluster may include at least two sensors and the computing device may be configured to process the received acoustic signals and provide localization of the acoustic source in three dimensions. The cluster of acoustic sensors may comprise at least one seismic wave sensor.

A system and method for tracking aircraft, helicopters and/or other objects at an airfield using acoustics of the aircraft, helicopters and/or other objects. A method receives first acoustical data at a first sensor and second acoustical data is also received at a second sensor. The first and second sensors may be carried by a first structurally supportive body member. Based at least in part on the first acoustical data and the second acoustical data a range and a bearing of the aircraft is determined from a predetermined location at the airfield. The range and bearing can be determined by using a beam forming algorithm. Based on the range and the bearing, the method displays the location the aircraft on a display.