ISO 17208-2:2019
Underwater acoustics — Quantities and procedures for description and measurement of underwater sound from ships — Part 2: Determination of source levels from deep water measurements
This document specifies methods for calculating an equivalent monopole source level by converting radiated noise level values obtained in deep water according to ISO 17208-1. Procedures are also given for direct calculation from measurements made in deep water with specific hydrophone geometry. The source level calculated by the procedure in this document is that of an equivalent monopole source at a specified nominal source depth, and for broadside aspect only. The nominal source depth is intended to be reported with the equivalent monopole broadside source level value.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Conversion of acoustic source level from radiated noise level measured in deep water
4.1 Measurement procedure
4.2 Calculation of source level from radiated noise level performed as in ISO 17208-1
5 Measurement uncertainty
6 Special requirements for reporting of broadside aspect source level
6.1 General
6.2 Special parameters
Annex A (informative) Ship radiated noise source level correction formulae considering the Lloyd's mirror effect
Annex B (informative) Ship noise source level correction formulae for measurements that deviate from ISO 17208-1
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Conversion of acoustic source level from radiated noise level measured in deep water
4.1 Measurement procedure
4.2 Calculation of source level from radiated noise level performed as in ISO 17208-1
5 Measurement uncertainty
6 Special requirements for reporting of broadside aspect source level
6.1 General
6.2 Special parameters
Annex A (informative) Ship radiated noise source level correction formulae considering the Lloyd's mirror effect
Annex B (informative) Ship noise source level correction formulae for measurements that deviate from ISO 17208-1
Bibliography