Current impulse method and apparatus for testing geophone string
Determination of sensor distance
Determination of system response
Device for determining the configuration and calibrating long, t
Difar demultiplexer test circuit
Digital signal demodulator calibration system and method for...
Directional line-hydrophone array calibrator
Directivity display device and method
Doppler log
Dual slope compensation apparatus
Echo simulator for active sonar
Electric test set for acoustic torpedo homing systems
Fiber-optic seismic array telemetry, system, and method
Frequency-modulated monitor hydrophone system
Geophone checker
Geophone normalization process
Geophone testing apparatus
Hydrophone acoustic response chamber
Hydrophone array polarity test circuit
Hydrophone checker