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GB/T 44042-2024 English PDF

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GB/T 44042-2024: Test method for underwater radiated noise from ships
Status: Valid

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
GB/T 44042-2024	English	839	Add to Cart	6 days [Need to translate]	Test method for underwater radiated noise from ships	Valid	GB/T 44042-2024

PDF similar to GB/T 44042-2024

Standard similar to GB/T 44042-2024

GB/T 7094 CB 1146.9 CB 1146.8 GB/T 21478 GB/T 37820.1

Basic data

Standard ID	GB/T 44042-2024 (GB/T44042-2024)
Description (Translated English)	Test method for underwater radiated noise from ships
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	U04
Classification of International Standard	17.140
Word Count Estimation	42,489
Date of Issue	2024-05-28
Date of Implementation	2024-12-01
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration

GB/T 44042-2024: Test method for underwater radiated noise from ships

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ICS 17:140 CCSU04 National Standards of People's Republic of China Measurement method of underwater radiated noise from ships Released on 2024-05-28 2024-12-01 implementation State Administration for Market Regulation The National Standardization Administration issued

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Symbols 4 5 Instruments and Equipment 5 6 Measurement requirements and measurement process 7 7 Data Processing 14 8 Measurement uncertainty 17 9 Reporting requirements18 Appendix A (Informative) 1/3 octave and 1/10 octave frequency tables 20 Appendix B (Informative) Typical seabed properties and depths corresponding to low-frequency cut-off frequencies and critical distances for sound propagation 22 Appendix C (Informative) Wind force level characteristics and conversion 26 Appendix D (Informative) Hydrophone Deployment Measures to Reduce the Impact of Waves and Flows 27 Appendix E (Informative) Method for calculating sound source level in shallow waters at a single distance 29 Appendix F (Informative) Test Record Format 31 Reference 34

Foreword

This document is in accordance with the provisions of GB/T 1:1-2020 "Standardization work rules 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 is under the jurisdiction of the National Technical Committee for Standardization of Marine Vessels (SAC/TC12): This document was drafted by: China Ship Science Research Center, China Classification Society Shanghai Standards Institute, China Shipbuilding Group Co:, Ltd: The 708th Institute, the 715th Institute of China Shipbuilding Industry Corporation, and the 91388th Unit of the People's Liberation Army of China: The main drafters of this document are: Pang Yezhen, Wu Wenwei, Pei Yuqing, Li Zhichao, Zhou Yajun, Wang Fuhua, Hu Dongsen, Liu Jin, Li Zecheng, Ye Xi, Chen Yi, Qin Jiangxuan, Liu Yucai, Cao Liang, Zhang Shuai, and Fashion: Measurement method of underwater radiated noise from ships

1 Scope

This document specifies the instrumentation, measurement requirements and measurement methods for measuring underwater radiated noise of ships in marine or lake environments: Process and data processing methods: This document is applicable to the underwater radiated noise measurement of surface ships in navigation, including manned and unmanned ships, and other underwater navigation objects: The underwater radiated noise during navigation can also be applied for reference:

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 3947-1996 Acoustic terminology GB 12327-2022 Hydrographic Survey Specification GB/T 41311:1-2022 Acoustics Quantities describing underwater noise of ships and their measurement methods Part 1: Quantities for comparison purposes Requirements for deepwater precision measurement ISO 17208-2:2019 Acoustics Quantities describing underwater noise from ships and their measurement methods Part 2: Measurement conditions under deep water IEC 60565-1:2020 Underwater acoustics - Hydrophone calibration - Part 1: Free-field calibration procedure for hydrophones hydrophones) IEC 60565-2:2019 Underwater acoustics and hydrophones - Hydrophone calibration - Part 2: Low frequency sound pressure field calibration procedure calibration)

3 Terms and definitions

The terms and definitions defined in GB/T 3947-1996 and the following apply to this document: 3:1 deepwater The water depth is greater than the larger value of 150m and 1:5 times the ship length: 3:2 Shallow water The water depth is greater than 30m and less than 150m and 1:5 times the larger value of the ship length: 3:3 background noise Noise generated by all noise sources (biological and abiotic) other than the vessel being measured (including the self-noise of the measurement):

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