Controlling Machinery Induced Underwater Noise - NOAA
Controlling Machinery Induced Underwater Noise - NOAA
Controlling Machinery Induced Underwater Noise - NOAA
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Advanced Treatments<br />
Air layer (belt forward of engine room)<br />
– Effective mid- mid to high-frequency high frequency (10+ dB)<br />
– Amplifies low freq (-5 ( 5 dB over 50 Hz bw)<br />
– Holes can clog if not maintained<br />
Hull coating<br />
– Effectiveness depends on material<br />
‘compliance<br />
compliance’ and thickness (>10 dB)<br />
– Adherence and damage issues<br />
NCE/<strong>NOAA</strong> Symposium
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