摘要:
Embodiments related to sound sources for marine geophysical surveys. An embodiment provides a sound source (2), comprising: an outer shell (10) containing a first gas at a first gas pressure; and a compliance chamber (4) in indirect fluid communication with the first gas, the compliance chamber containing a second gas at a second gas pressure, wherein the second gas pressure is lower than the first gas pressure. An embodiment provides a sound source for marine geophysical surveys, comprising: an outer shell; a mass coupled to the outer shell; and an actuator coupled to the outer shell. Additional apparatus and methods are disclosed herein.
摘要:
Embodiments related to sound sources for marine geophysical surveys. An embodiment provides a sound source (2), comprising: an outer shell (10) containing a first gas at a first gas pressure; and a compliance chamber (4) in indirect fluid communication with the first gas, the compliance chamber containing a second gas at a second gas pressure, wherein the second gas pressure is lower than the first gas pressure. An embodiment provides a sound source for marine geophysical surveys, comprising: an outer shell; a mass coupled to the outer shell; and an actuator coupled to the outer shell. Additional apparatus and methods are disclosed herein.
摘要:
Vorrichtung (10) zur Erzeugung mechanischer Schwingungen in einem festen Material, insbesondere in Festgestein, mit einem in einem Gehäuse (11) angeordneten elektrisch angetriebenen Schwingungserzeuger, wobei der Schwingungserzeuger (12) ein axial wirkender, magnetostriktiver Schwingungsgeber ist.
摘要:
Acoustic transmitter in particular for use in offshore seismic explorations, having sound-emitting surfaces (1, 2) being adapted to be subjected to vibrational movement by means of a drive unit (21) through at least one push element (22A, 22B) and two plate-like end pieces (3, 4) which are connected to the sound-emitting surfaces. The sound-emitting surfaces are formed by two curved plate members (1, 2) being of comparable width and heigth dimensions. The end pieces (3, 4) have a generally rectangular shape with a first pair of opposing side edges connected (5, 6, 7, 8) to end portions of the plate members (1, 2). Another pair of side edges on each end piece (3, 4) as well as side edges of the plate members engage two side plates (9, 10) which at either side closes the acoustic transmitter, preferably in a tightly enclosing manner.