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Underwater Acoustic Transducers
Passive Acoustic Surveillance and Scientific Monitoring
Active Sonar
Acoustic Navigation and Positioning
Acoustic Communication
Calibration, Self Noise, and Radiated Acoustic Signatures
Buoy and Mooring Sensor and Data Acquistion Systems
Acoustic Arrays
Custom Design and Fabrication
Acoustic Noise Floor Test Facility
Acoustic Communication
APS has designed, fabricated and demonstrated an enhanced Underwater Loudhailer (eLoud ) for the Technology Support Working Group.  eLoud allows for voiced or prerecorded messages to be transmitted at moderately high power underwater to warn and deter divers before they approach sensitive installations.  We have matured eLoud through a series of demonstrations and performance evaluations and will soon be delivering 120 units to the US Coast Guard, with the primary application being port security.
                                Download the eLoud Flyer

APS is also developing wideband, directional transducers for digital spread spectrum underwater acoustic communications.
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