A horizontal acoustic vector sensor system described herein includes a housing which has a gimbal assembly therein which is attached to a sensor assembly which has multiple pairs of seismometers that arranged orthogonally to one or more neighboring pairs of seismometers, along an approximately horizontal axis. The gimbal assembly with sensor assembly are enclosed within the housing by an endcap which includes an electronics assembly. The multiple pairs of seismometers are wired to the electronics assembly through a slip-ring which allows for movement of the gimbal assembly without entangling the wires. The horizontal acoustic vector sensor system further includes at least one omni-directional hydrophone integrated into the endcap.

Sounds arriving from outside of a mobile body are collected by a microphone disposed inside the mobile body. A sound collecting apparatus according to the present disclosure is attached to the mobile body. The sound collecting apparatus according to the present disclosure includes a microphone that is directly or indirectly in contact with an outer face member, which is a member forming an outer face of the mobile body, from an inner side of the mobile body and collects sounds propagating through the outer face member. In a case where the microphone has directivity, the microphone is disposed in a direction in which sounds propagating from the outer face of the outer face member to the inner side are collected. The outer face member is, for example, glass.

Sounds arriving from outside of a mobile body are collected by a microphone disposed inside the mobile body. A sound collecting apparatus according to the present disclosure is attached to the mobile body. The sound collecting apparatus according to the present disclosure includes a microphone that is directly or indirectly in contact with an outer face member, which is a member forming an outer face of the mobile body, from an inner side of the mobile body and collects sounds propagating through the outer face member. In a case where the microphone has directivity, the microphone is disposed in a direction in which sounds propagating from the outer face of the outer face member to the inner side are collected. The outer face member is, for example, glass.

A sound isolation testing system and a sound isolation testing method are provided. The sound isolation testing system is adapted to test a product having a sound hole, and includes a detection device and a gas pressure detector. The detection device includes a gas cover, and the sound hole is sealed by the gas cover. The gas pressure detector is electrically connected to the detection device. The gas pressure detector determines a gas pressure change rate in the sound hole, and calculates the sound isolation value of the product according to the gas pressure change rate.

Systems and methods for identifying potential bullying are disclosed. In various aspects, a system for identifying potential bullying includes a sound detector configured to provide samples of sounds over time, a processor, and a memory storing instructions. The instructions, when executed by the processor, cause the system to determine that a noise event has occurred by processing the samples to determine that the sounds exceed a sound level threshold over a time period that exceeds a time period threshold, process the samples to provide frequency spectrum information of the noise event, determine whether the noise event is a potential bullying occurrence based on comparing the frequency spectrum information of the noise event and at least one frequency spectrum profile, and initiate a bullying notification in a case of determining that the noise event is a potential bullying occurrence.

Example methods and systems for displaying one or more indications that indicate (i) the direction of a source of sound and (ii) the intensity level of the sound are disclosed. A method may involve receiving audio data corresponding to sound detected by a wearable computing system. Further, the method may involve analyzing the audio data to determine both (i) a direction from the wearable computing system of a source of the sound and (ii) an intensity level of the sound. Still further, the method may involve causing the wearable computing system to display one or more indications that indicate (i) the direction of the source of the sound and (ii) the intensity level of the sound.

Exemplary embodiments include an apparatus for imaging a volume of material contained inside a vessel. The apparatus includes a plurality of synchronized acoustic sensors positioned at a periphery of an inner volume of the vessel. A processor combines the outputs of the acoustic sensors to identify at least one ambient noise source of the industrial process generating a noise field that illuminates an internal volume of the vessel and to provide an image of the material by temporal and spatial coherent processing of the transmission and reflection of the noise field generated by the noise source.

Passive device for broadband acoustic acquisition (3) that can communicate with a digital processing unit (4), the device including a plurality of microphone sensors (7) that can generate an electric signal (8) that is representative of an acoustic pressure (9) received, electronics for processing and digitizing (12) electric signals being able to adapt the electric signals and transform them into digital signals (13) of acoustic pressure, transfer electronics (14) being able to communicate with a digital processing unit (4) and to make possible the transfer of the digital signals of acoustic pressure to the digital processing unit. The microphone sensors and the transfer electronics are mounted on a multifunctional rigid support element (17) that incorporates the processing and digitizing electronics.

A method for measuring noise is disclosed. The method includes a sound pressure measurement step for measuring sound pressure information from a noise source with a sound pressure sensor. The method further includes a distance determination step for determining distance determinant information indicative of distance between the noise source and the sound pressure sensor. The sound pressure measurement step and the distance determination step are executed in an unmanned aerial measurement apparatus. The unmanned aerial measurement apparatus includes an unmanned aerial vehicle. The method includes controlling flight of the unmanned aerial measurement apparatus. A related unmanned aerial measurement apparatus is also disclosed.

A method for measuring noise is disclosed. The method includes a sound pressure measurement step for measuring sound pressure information from a noise source with a sound pressure sensor. The method further includes a distance determination step for determining distance determinant information indicative of distance between the noise source and the sound pressure sensor. The sound pressure measurement step and the distance determination step are executed in an unmanned aerial measurement apparatus. The unmanned aerial measurement apparatus includes an unmanned aerial vehicle. The method includes controlling flight of the unmanned aerial measurement apparatus. A related unmanned aerial measurement apparatus is also disclosed.