Section 6 Excessive noise and vibration
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Naval Ships, January 2023 - Volume 3 Additional Class Notations - Part 2 Naval Ship Safety - Chapter 7 Noise and Vibration Levels in Personnel Spaces - Section 6 Excessive noise and vibration

Section 6 Excessive noise and vibration

Parent topic: Chapter 7 Noise and Vibration Levels in Personnel Spaces

6.1 Noise excesses

6.1.1 Noise levels and sound reduction indices greater than those specified in these Rules may be considered. Not more than 10 per cent of the accommodation spaces or work spaces are to exceed the relevant noise criteria, with a maximum exceedance limit per space/ partition of 3 dB(A).

6.1.2 If the noise levels exceed the allowable noise criteria, at least two adjacent spaces shall be measured, including spaces on the same deck and/or on decks above and below.

6.1.3  Where the noise level in machinery spaces (or other spaces) is greater than 85 dB(A), entrances to such spaces shall be provided with an appropriate warning notice. If only a minor portion of the space has such noise levels, the particular location(s) or equipment shall be identified at eye level, visible from each direction of access.

6.2 Vibration excesses

6.2.1 Vibration levels greater than those specified in these Rules may be considered. Not more than 10 per cent of all accommodation spaces or work spaces are to exceed the relevant vibration criteria, with a maximum exceedance limit per space of 1 mm/s.

6.2.2 If the vibration levels exceed the allowable vibration criteria, at least two adjacent spaces shall be measured, including spaces on the same deck and/or on decks above and below.

Copyright 2022 Clasifications Register Group Limited, International Maritime Organization, International Labour Organization or Maritime and Coastguard Agency. All rights reserved. Clasifications Register Group Limited, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as 'Clasifications Register'. Clasifications Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Clasifications Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.