Note:  Report No. 125 S Netherlands Ship Research centre TNO.
Abstract: Noise criteria in terms of sound pressure levels and frequencies are proposed for the passengers’ and the crew’s accommodation, for the bridge and for the engineroom of sea-going ships with respect to hearing conservation, audibility of whistles, speech communication, comfort and annoyance. It is shown that the NR-noise rating curves efficiently correlate with annoyance and that sound level A in contrast to industrial noise and road traffic noise is impracticable for ship noises. A short survey of acoustical measures applied in existing ships illustrates that the proposed criteria can be met.