Controlling Machinery Induced Underwater Noise - NOAA

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Acoustic Insulation NCE/<strong>NOAA</strong> Symposium Reduces AB & SSB Transmission. Typically insulation’s insulation s base material is either fiberglass or mineral wool. High Transmission Loss (or HTL) material has middle layer of limp mass (usually leaded vinyl). Transmission Loss or STC (Sound Transmission Class) defines performance.
Treatment Effectiveness Treatment Vibration Isolation – passive $20-$400/mt $20 $400/mt Raft mount equipment Steel framing Acoustic Insulation 3 to 8 pcf; pcf; $1-$4/ft $1 $4/ft2 Damping; 2-3 2 3 psf; psf; $8-$12/ft $8 $12/ft 2 Bow Thruster Treatments NCE/<strong>NOAA</strong> Symposium AB 0 0 5-10 10 0 10 FSB 10- 10 20 5 0 5-10 10 10 SSB 0 0 5-10 10 5-10 10 “Quiet Vessel” approximately 7% to 10% total cost of vessel. Quiet R/V 15% to 20% cost of vessel. Values are approximate dB reduction of overall sound. 10
Page 1 and 2: Controlling Machinery Induced Under
Page 3 and 4: Range to achieve 120 dB Level 5-m Z
Page 5 and 6: Cargo Ship Broad Band Noise NCE/NOA
Page 7 and 8: 19 0 18 0 17 0 16 0 15 0 14 0 13 0
Page 9 and 10: NCE/NOAA Symposium
Page 11 and 12: Best Acoustic Design Use inherently
Page 13: Two-stage Genset Isolation System f
Page 17 and 18: Advanced Treatments Air layer (belt
Page 19 and 20: Designer NOISE Program for shipboar
Page 21 and 22: FRV Radiated Noise - 11 kts NCE/NOA
Page 23 and 24: FRV-40 5-m Zodiac Tug & Barge @ Sup
Page 25 and 26: References On active vibration isol

Controlling Machinery Induced Underwater Noise - NOAA

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