. Effects of noise of offshore oil and gas operations on marine mammals : an introductory assessment. Offshore oil industry; Gas well drilling; Noise pollution. HILLHOUSE Water Depth: 192 ft. HydroDhone Depth: 100 ft. Distance: 100 ft. I Tonal (Spectrum line) '""^ Broad band (cont. Spect.). HENRY Water Depth: 162 ft. Hydrophone Depth: 100 ft. Distance: 100 ft. 120 p 1 -A 1 ! ! â 1 â - - - â 1 1 - X 1 ;o'i k s . 1 ~^ ^ J«0^ s, -1-^ 'N ^r^ ^ ^^.^M^ K' â ' ^ iJT^-S^~iL 1 ^'° 1 â -\- â^ â "-^""x^ V N^^ s" s^ 1 ,, 11 Jll , , U 1' i ,, LJ 50 100 200 5

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. Effects of noise of offshore oil and gas operations on marine mammals : an introductory assessment. Offshore oil industry; Gas well drilling; Noise pollution. HILLHOUSE Water Depth: 192 ft. HydroDhone Depth: 100 ft. Distance: 100 ft. I Tonal (Spectrum line) '""^ Broad band (cont. Spect.). HENRY Water Depth: 162 ft. Hydrophone Depth: 100 ft. Distance: 100 ft. 120 p 1 -A 1 ! ! â 1 â - - - â 1 1 - X 1 ;o'i k s . 1 ~^ ^ J«0^ s, -1-^ 'N ^r^ ^ ^^.^M^ K' â ' ^ iJT^-S^~iL 1 ^'° 1 â -\- â^ â "-^""x^ V N^^ s" s^ 1 ,, 11 Jll , , U 1' i ,, LJ 50 100 200 500'.C>00 HOUCHIN Water Depth: 162 ft. Hydrophone Depth: 100 ft. Distance: 100 ft. 7 Spectra of underwater noise of platforms Hillhouse, Henry and Houchin superimposed or, average deep water ambient noise spectra F-19. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Gales, R. S; Naval Ocean Systems Center (U. S. ); United States. Bureau of Land Management. San Diego, Calif. : Naval Ocean Systems Center

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