Section 5 Assessment
Clasification Society 2024 - Version 9.40
Clasifications Register Guidance Information - Ship Vibration and Noise Guidance Notes - Chapter 8 Noise - Section 5 Assessment

Section 5 Assessment

5.1 The maximum acceptable sound pressure levels should not exceed the values given in Table 8.8.3 Acceptable maximum noise levels for crew which are identical to those given in IMO Code on noise levels on board ships.

5.2 The levels given in Table 8.8.3 Acceptable maximum noise levels for crew do not apply to passenger cabins or other passenger spaces except in so far as they are workplaces.

5.3 Where the recommended maximum level in Table 8.8.3 Acceptable maximum noise levels for crew is exceeded by 3 dBA, or contains subjectively annoying low frequency or obvious tonal components, the noise levels in the octave bands centred on 31.5 to 8000 Hz (linear, without A-weighting) should be measured to determine the noise rating (NR) number in accordance with ISO 1996. The limits are satisfied if the Noise Rating is no higher than the dBA limit minus five. Noise rating curves are included in Figure 3.4.1 Noise rating curves .

Parent topic: Chapter 8 Noise
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