Seismic sound-sources

The seismic sound source creates an acoustic signal in the water.

This acoustic signal penetrates into the seabed, and is reflected at each boundary between layers that have a different acoustic impedance.

The ability to distinguish two layers, or reflectors, is called resolution. This resolution depends on the frequency of the acoustic source.

Multi-tip sparker-electrodes 25 to 6000 joules

sparking electrode in salty water
sparking electrode in salty water

These characteristic multi-tip sound-sources have been designed and optimized for the range of energies used with the sparkers, from 25 to 6000 joules.

 

These floating spark-arrays are planar,

easy to handle,

and very light weight.

 

No need for a heavy catamaran.

Can be used a small boat for littoral studies, as well as on large oceanographic vessels.

 

All the models of sparker-tips are interchangeable and can be mounted on the same floating high voltage cable.


Télécharger
SIG multi-tip sparker-electrodes
Models ELC30L, ELC1200L, ELC820, EDL1020, ELP1250, ELP790
Electrodes 2015.pdf
Document Adobe Acrobat 6.4 MB

The sparker signatures vary with the electrode configuration. And the resolution can be improved with the reduction of the second sparker pulse, commonly called the bubble collapse in the litterature.


Acoustic signature of sound sources

& receiver 12 hydros streamer
Acoustic signature of multi-tip sparker-electrode EDL1020 at 2000 Joules

The SIG sparker-electrodes, or spark-arrays, are recognized for their acoustic signal signatures.

 

The sparker-tips have to be replaced due to the electrolysis phenomenon mobilizing the cations. 

The best high resolution signature on the seismic sound source requires this concession of trimming the tips of the sparker-electrode.