Hydraulic vibrator

Hydraulically-coupled, land seismic signal source

Impact tool

Implosive acoustic generator

Internal air release control apparatus air gun

Internal bubble-suppression method and apparatus

Internal bubble-suppression method and apparatus

Internal passive air release control apparatus in seismic air gu

Internal sleeve air release control apparatus in seismic air gun

Land seismic acoustic source

Land seismic gas detonator

Lift and isolation system for seismic vibrator

Liquid slug projector apparatus

Low energy source for seismic operation

Marine acoustic pulse train signal generator

Marine gas exploder

Marine seismic acquisition method and apparatus

Marine seismic transducer

Marine seismic vibrator having support structure including vibra

Marine shear wave vibrator