Effects of noise of offshore Effects of noise of offshore oil and gas operations on marine mammals : an introductory assessment effectsofnoiseof00gale Year: 1982 FREQUENCY (kHz) Figure 7. Behavioral underwater audiograms (smoothed cilrves) for the beluga whale and the bottlenosed porpoise. - HARBOR PORPOISE - KILLER WHALE FREQUENCY (kHz) Figure 8. Behavioral underwater audiograms (smoothed curves) for the harbor porpoise and the killer whale. H-17

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