Noise

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Noise Vibration Comfort Class

• John Ødegaard
• Ødegaard Danneskiold-Samsøe
• Consulting Engineers - Noise and Vibration
  Control
• Member of Lloyds Register Group

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Company description

• Consulting engineers, noise and vibration
• Founded in 1980
• Taken over by Lloyds in September 2005
• Will be operated as independent company
• Departments divided into marine, rotordynamics,
  industrial and train

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ØDS Marine department
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Marine Clients

• Ship owners
• Ship yards
• Designers
• Sub-suppliers
• Authorities

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Types of Work, Marine

• Setting of specifications
• Predictions
• Advice on reduction measures
• Verification
• Troubleshooting

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Rules and regulations

• Building specifications set by Owner
• National e.g. DMA, Sjøfartsdir.,SBG, etc.
• International e.g. EEC, IMO and ISO
• Classification Comfort Class

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Classification Comfort Classes

• DNV Tentative rules for classification of ships,
  1995
• GL Harmony Class Rules on rating noise and
  vibration for comfort, Cruise ships, 2003
• BV Service notations comfort onboard, 2000
• ABS Guide for crew habitability on ships, 2001
• RINA Rules for the evaluation of noise and
  vibration comfort on board passenger ships, 1999
• LR Provisional Rules. Passenger and Crew
  Accommodation comfort, 2004

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Content

• Well defined
• Definitions
• Limits
• Measurement procedures
• Test conditions
• Excesses
• Reporting

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Parameters

• Noise levels, Lp
• Vibration levels, Lv
• Sound transmission loss, Rw
• Impact sound, Ln
• Indoor climate

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Extracts, Lloyds Comfort Rules
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Conclusion

• Need for one common rule
• Usefull tool for specifications
• Individual wishes need to be included in
  specifications

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The End