Figure 3.103: Signature of a single 150 cu. in. airgun firing at 10m depth with 2,000 psi air pressure: conventional (black), eSource A (red), eSource B (green), and eSource C (blue). 10 shots superposed, main peak only.
c
Figure 3.104: Signature of the eSource airgun with time scale extended to free- bubble oscillations.
d
Figure 3.105: Source spectral energy over 1,000 ms.
Figure 3.102: The eSource airgun CFD simulation (left) and image from physical experiment (right) shown with corresponding near-field acoustic pressure (inset) at four instants: main peak (a), first trough and maximum bubble extent (b), zero crossing (c), and second bubble peak (d).
