Passive optical detection of underwater sound
Passive ranging sonar system
Passive seismic event detection
Passive sonar transducer arrangement
Passive sound telemetry method
Passive underwater range measurement acoustic system
Passive underwater target detection and locating system
Patch test for 3D sonar data
Pattern comparison ultrasonic surveillance system with noise sup
Peak detector for resolution enhancement of ultrasonic visualiza
Performing 3-D scatterer imaging from 2-D seismic data
Performing quality control with respect to positioning of...
Permanent downhole resonant source
Permanent magnet biased magnetostrictive transducer
Permanent seafloor seismic recording system utilizing micro...
Permutating analog shift register variable delay system
Personal identification method and apparatus using acoustic...
Personal object detector
Personal object detector with enhanced stereo imaging capability
Personal protective device and method of using the same