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GB/T 43943-2024: Environmental noise emitted by vessels
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GB/T 43943-2024: Environmental noise emitted by vessels

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ICS 17:140:30 CCSU04 National Standards of People's Republic of China Ship environmental noise Released on 2024-04-25 2024-08-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Foreword

This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting: Please note that some of the contents of this document may involve patents: The issuing organization of this document does not assume the responsibility for identifying patents: This document was proposed and coordinated by the National Technical Committee for Standardization of Marine Vessels (SAC/TC12): This document was drafted by: China Classification Society: The main drafters of this document: Zhou Yajun and Qin Jiangxuan: Ship environmental noise

1 Scope

This document specifies the ship ambient noise limit, measurement equipment, measurement conditions, measurement point layout, measurement procedures, post-processing of measurement results, Report: This document is applicable to the measurement and evaluation of environmental noise caused by navigation in waterways and ships moored at ports and terminals in areas with dense populations:

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document: For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document: GB/T 3241-2010 Electroacoustic octave and fractional octave filters GB/T 3785:1-2023 Electroacoustic sound level meter Part 1: Specification GB/T 15173-2010 Electroacoustic sound calibrator GB/T 20441:4 Measurement microphones Part 4: Specifications for working standard microphones

3 Terms and definitions

The following terms and definitions apply to this document: 3:1 LAeq,T The average value of the energy of the sound level A within the specified measurement time (T): 3:2 LAS The maximum frequency-weighted (A) and time-weighted (S) sound pressure levels measured on the ship under test under specified operating conditions: 3:3 background noise Noise from all other sound sources other than the ship being measured: 3:4 day-time sound level The maximum AS-weighted sound level or equivalent continuous A-sound level measured during the daytime period: 3:5 night-time sound level The maximum AS-weighted sound level or equivalent continuous A-sound level measured during the nighttime period: 3:6 day-time The period between 6:00 and 22:00: ...