Dictionary:Fig B-10

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FIG. B-10. Bubble pulses from a small underwater explosion. The time between successive implosions decreases as energy is dissipated. Successive pulses effectively generate additional records superimposed on the first; the result is bubble noise. One measure of the effectiveness of a marine source is the ratio of the amplitudes of the primary to the first bubble. See also Figure S-16. (Courtesy Chevron Oil Co.)