Dual-mode vibrator
Dual-port air gun having a single shuttle
Dual-section push-pull underwater projector
Dual-wavefield multiple attenuation
Dynamic array aperture and focus control for ultrasonic imaging
Dynamic control circuit for multichannel system
Dynamic downhole recorder
Dynamic efficiency optimization of piezoelectric actuator
Dynamic filter tuning for pulse-echo ranging systems
Dynamic positioning of marine vessels
Dynamic range compression for variable area or wiggle trace disp
Dynamic source parameter selection for seismic vibrator data...
Dynamic source parameter selection for seismic vibrator data...
Dynamic underwater position tracking of small objects
Dynamically variable electronic delay lines for real time ultras