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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 Navigation and Positioning
Under Phase II STTR funding, APS is developing an Ultra Short Baseline Localization (USBL) system for surf zone unmanned vehicle applications.  The challenge on this project is developing a receive sensor that a) offers the requisite directionality at a low enough frequency to avoid excessive dissipation to bubbles and suspended sediment and b) is insensitive to the vibration and acoustic noise of the vehicle.

APS is developing custom vector sensor and transducer packages for this application.
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