scope:

This part of ISO 17208 describes the general measurement system, procedure, and methodology used for the measurement of underwater sound from ships under a prescribed operating condition. The resulting quantities are the root-mean-square sound pressure levels (SPL); herein used synomously with sound pressure level or SPL measured in the far-field of the ship and normalized to a distance of 1 m and reported in one-third-octave bands. In this part of ISO 17208 the result of these measurements is called "radiated noise level." The underwater sound pressure level measurement is performed in the geometric far field and then adjusted to the 1 m normalized distance for use in comparison with appropriate underwater noise criteria. This International Standard does not specify or provide guidance on underwater noise criteria or address the potential effects of noise on marine organisms.