Noise-suppressing hydrophones
Noise-suppression method
Non-contact borehole caliber measurement
Non-contacting liquid level detection system
Non-destructive method of measuring physical characteristics of
Non-integer sample delay active noise canceller
Non-invasive acoustic velocimetric apparatus and method
Non-kinking oil-filled acoustic sensor stave
Non-linear optoacoustic narrowband communications technique
Non-linear seismic trace matching to well logs
Non-liquid filled streamer cable with a novel hydrophone
Non-liquid filled streamer cable with a novel hydrophone
Nondestructive downhole seismic vibrator source and processes of
Noninvasive ultrasonic proximity detector for a fluid actuated c
Noninvasive ultrasonic proximity detector for a fluid actuated c
Nonlinear equalizer for measurement while drilling telemetry sys
Nonlinear techniques for pressure vector acoustic sensor...
Nonwavelength-limited holographic sound field reconstruction
Normally closed pressure-sensitive hydrophone switch
Nuclear fuel bundle spacer spring force gauge