Abstract: A hydrophone unit comprising a resilient central wire; a conductive wire coiled around the resilient central wire, said conductive wire being coated with a piezo material for generating an electrical signal in response to the presence of an acoustic vibration, wherein the resilient central wire is fabricated from spring steel, the conductive wire is a copper wire, the piezo material includes polyvinylidene difluoride; a layer of conductive material deposited on the piezo material-coated conductive wire, wherein the layer of conductive material comprises a silver ink; and a jacket of polyurethane.

Abstract: A hydrophone array includes an inflatable shaped housing enclosing an interior space and formable between a collapsed configuration and an expanded configuration, a framework of compliant material disposed within the interior of the inflatable housing, and a plurality of hydrophones attached to the compliant material at respective positions, wherein said hydrophones are arranged in a predetermined geometric array when the shaped housing is in the expanded configuration. Also provided herein is a system and method for deploying the hydrophone array.

Abstract: A hydrophone deployment system including a hydrophone assembly, a container for enclosing the hydrophone assembly body in a coiled configuration, means for ejecting the hydrophone assembly from the container, a signal processing module for processing the electrical signals from the hydrophone units, and a transmitter module for converting said processed electrical signals and transmitting said converted signals to a remote receiver.

Abstract: A hydrophone assembly includes at least four hydrophone units for converting an acoustic signal to an electrical signal, the hydrophone units being in a parallel, cylindrically symmetric spaced spatial relationship with each other, and at least one spacer element to maintain the hydrophone units fixed in the spatial relationship to each other, wherein the hydrophone units and spacer element are embedded in an encapsulant to form an elongated, flexible body.

Abstract: A hydrophone assembly includes at least four hydrophone units for converting an acoustic signal to an electrical signal, the hydrophone units being in a parallel, cylindrically symmetric spaced spatial relationship with each other, and at least one spacer element to maintain the hydrophone units fixed in the spatial relationship to each other, wherein the hydrophone units and spacer element are embedded in an encapsulant to form an elongated, flexible body.

Abstract: A hydrophone array includes an inflatable shaped housing enclosing an interior space and formable between a collapsed configuration and an expanded configuration, a framework of compliant material disposed within the interior of the inflatable housing, and a plurality of hydrophones attached to the compliant material at respective positions, wherein said hydrophones are arranged in a predetermined geometric array when the shaped housing is in the expanded configuration. Also provided herein is a system and method for deploying the hydrophone array.

Abstract: A sonar system for detecting underwater acoustic signals includes a plurality of hydrophone units capable of converting acoustic impulses to electrical signals, the hydrophone units being substantially vertically oriented when deployed in a body of water, and the hydrophone units occupying at least some of the positions of an M×N horizontal array. Two-dimensional Chebyshev mathematical weighting is applied to the electrical signals from the individual hydrophone units such that each individual signal from each hydrophone unit is assigned a respective weighting number and a numerical value is assigned to each individual signal corresponding to the strength of the electrical signal as adjusted by the respective weighting number.

Abstract: A sonar system for detecting underwater acoustic signals includes a plurality of hydrophone units capable of converting acoustic impulses to electrical signals, the hydrophone units being substantially vertically oriented when deployed in a body of water, and the hydrophone units occupying at least some of the positions of an M×N horizontal array. Two-dimensional Chebyshev mathematical weighting is applied to the electrical signals from the individual hydrophone units such that each individual signal from each hydrophone unit is assigned a respective weighting number and a numerical value is assigned to each individual signal corresponding to the strength of the electrical signal as adjusted by the respective weighting number.

Abstract: A hydrophone array includes an inflatable shaped housing enclosing an interior space and formable between a collapsed configuration and an expanded configuration, a framework of compliant material disposed within the interior of the inflatable housing, and a plurality of hydrophones attached to the compliant material at respective positions, wherein said hydrophones are arranged in a predetermined geometric array when the shaped housing is in the expanded configuration. Also provided herein is a system and method for deploying the hydrophone array.

Abstract: A hydrophone assembly includes at least four hydrophone units for converting an acoustic signal to an electrical signal, the hydrophone units being in a parallel, cylindrically symmetric spaced spatial relationship with each other, and at least one spacer element to maintain the hydrophone units fixed in the spatial relationship to each other, wherein the hydrophone units and spacer element are embedded in an encapsulant to form an elongated, flexible body.

Abstract: A system and method for predicting passive, high-frequency sonar array performance at any underwater location, implemented as a software package running on a computer. An operator selects an arbitrary geographical location, specifies a sonar array and defines a target. The necessary bathymetry, and associated oceanographic, environmental and meteorological data are automatically acquired or generated, along with appropriate models for ocean surface and bottom reflectivity, and vertical noise directionality. A Comprehensive Acoustic System Simulation (CASS) software module performs appropriate ray tracing, which is used to produce Cross-Spectral Density (CSD) matrices for the target and the anisotropic ambient noise. These are used to generate graphic and numeric representations of the array's performance at the selected location. A time of year may also be specified and the appropriate anisotropic noise field for conditions expected at that location at that time of year will be generated.