An acoustic system and method detect and locate low intensity and low frequency sound sources in an investigation area. An acoustic system is effective in identifying survivors trapped under rubble following a catastrophic event. The acoustic system focuses on the low frequency components of the human voice and includes acoustic sensors for detecting acoustic signals generated by the sound sources and for generating data representative of the acoustic signals. A wireless transmitter transmits the data representative of the detected acoustic signals to an electronic receiver block that receives and analyzes the data. A processor executes calibration of the acoustic sensors of the suite to temporally align each signal received from the acoustic sensors, and executes a digital beamforming to combine the data representative of the detected acoustic signals and to create an acoustic image of the investigation area to locate the low intensity and low frequency sound sources.

Disclosed embodiments may relate to systems and methods for monitoring and/or mapping noise data from a plurality of noise monitoring devices. In some embodiments, the plurality of noise monitoring devices may include hearing protection devices configured to detect noise, and typically may communicate such noise data (which may also include location) so that the noise data can be pooled. The pooled noise data from the plurality of noise monitoring devices may then be used to the benefit of one or more of such noise monitoring devices.

A memory is configured to store instructions and a processor is configured to execute the instructions, and the instructions comprise: propagation path estimation apparatus comprises calculating feature value from output signals from a plurality of sensors, and determining a propagation path corresponding to the feature value.

Provided are sound direction detection sensors capable of detecting an input direction of sound and electronic apparatuses including the same. A sound direction detection sensor includes a sound inlet receiving input sound, a sound outlet outputting the sound input through the sound inlet, and a plurality of directional vibrators arranged between the sound inlet and the sound outlet in such a manner that at least one directional vibrator selectively reacts based on a direction of the sound input through the sound inlet, wherein a direction perpendicular to a direction of a directional vibrator having a lowest output in magnitude among the plurality of directional vibrators is determined as an input direction of the sound.

A flying object detection system includes a sensor including a microphone array configured to collect a sound in a first detection area of a monitoring area, a radar configured to measure a distance to a flying object by detecting the flying object in flight in a second detection area of the monitoring area, and a control device configured to detect presence or absence of the flying object based on sound data on the sound in the first detection area collected by the microphone array, and configured to receive the distance to the flying object. The control device is configured to display information on a position of the flying object viewed from arrangement places of the sensor and the radar based on the distance to the flying object and a detection output of the flying object by the radar on a first monitor.

Systems and methods for improving spectral-shift methods for calculating acoustic attenuation coefficients are disclosed. Systems, methods, and apparatuses for transmitting ultrasound pulse sequences for improved signal-to-noise outside the main passband of ultrasound transducers are disclosed. Systems, methods, and apparatuses for using the echoes from the transmitted pulse sequences to calculate the attenuation coefficient are disclosed.

An acoustic vector sensor (AVS) includes one or more sensitive elements arranged in an orthogonal configuration to provide high-sensitivity directional performance. The one more sensitive elements may be seismometers arranged in a pendulum-type configuration. The AVS further includes a hydrophone.

A wireless field device for use in monitoring acoustic noise includes an acoustic sensor configured to sense acoustic noise. Processing circuitry coupled to the acoustic sensor is configured to identify a hazardous noise condition based upon the sensed acoustic noise and a personnel noise exposure standard. Output circuitry provides a warning output in response to an identified noise condition. A system is also provided which uses one or more acoustic sensors implemented in wireless field mounted monitors.

Provided are sound direction detection sensors capable of detecting an input direction of sound and electronic apparatuses including the same. A sound direction detection sensor includes a sound inlet receiving input sound, a sound outlet outputting the sound input through the sound inlet, and a plurality of directional vibrators arranged between the sound inlet and the sound outlet in such a manner that at least one directional vibrator selectively reacts based on a direction of the sound input through the sound inlet, wherein a direction perpendicular to a direction of a directional vibrator having a lowest output in magnitude among the plurality of directional vibrators is determined as an input direction of the sound,

Disclosed is a method and system for diffraction-aware non-line of sight (NLOS) sound source localization (SSL) that may reconstruct an indoor space, may generate acoustic rays into the indoor space based on an audio signal collected from the indoor space, and may estimate a position of an NLOS sound source based on a point at which one of the acoustic rays is diffracted.