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GB/T 42643-2023 English PDF

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US$299.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 42643-2023: Specification for in-situ survey of acoustic properties in marine sediments
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 42643-2023	299	Add to Cart	3 days	Specification for in-situ survey of acoustic properties in marine sediments	Valid

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Basic data

Standard ID: GB/T 42643-2023 (GB/T42643-2023)
Description (Translated English): Specification for in-situ survey of acoustic properties in marine sediments
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A45
Classification of International Standard: 07.060
Word Count Estimation: 14,118
Date of Issue: 2023-05-23
Date of Implementation: 2023-09-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42643-2023: Specification for in-situ survey of acoustic properties in marine sediments

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 07:060 CCSA45 National Standards of People's Republic of China Specification for in situ investigation of acoustic properties of seabed sediments Released on 2023-05-23 2023-09-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee

Preface I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 General 2 5 Survey equipment technical indicators 3 6 Sea Survey 4 7 Data collation and data processing 4 8 Investigation results and data archiving 6 Appendix A (Informative) Measurement Record Form 8 Appendix B (Informative) Schematic Diagram of Vertical Section of Sound Velocity and Sound Attenuation Coefficient 9 Reference 10

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 contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents: This document is proposed by the Ministry of Natural Resources of the People's Republic of China: This document is under the jurisdiction of the National Marine Standardization Technical Committee (SAC/TC283): This document is drafted by: The Second Institute of Oceanography of the Ministry of Natural Resources, the First Institute of Oceanography of the Ministry of Natural Resources, and Ocean Consulting of the Ministry of Natural Resources Center, China Ocean Engineering Consulting Association: The main drafters of this document: Tao Chunhui, Zhang Guoyu, Li Guanbao, Zhou Jianping, Kan Guangming, Deng Xianming, Wang Jingqiang, Meng Xiangmei, Mao Kejia, Zhang Baolu, Li Ming: Specification for in situ investigation of acoustic properties of seabed sediments

1 Scope

This document specifies the general rules for the in-situ survey of the acoustic properties of seabed sediments, the technical specifications of survey equipment, marine surveys, data collation and data analysis: Requirements for data processing, investigation results and data archiving: Note: Unless otherwise specified below, the acoustic characteristics only refer to the acoustic characteristics of longitudinal waves (waves in which particles move in the medium along the direction of propagation): This document is applicable to the in-situ investigation of the acoustic characteristics of seabed sediments, and is used for reference in the investigation of the acoustic characteristics of river and lake sediments:

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document: GB/T 12763:1 Specifications for Marine Survey Part 1: General Rules GB/T 12763:2 Marine Survey Specification Part 2: Marine Hydrological Observation GB/T 12763:5 Specifications for Marine Survey Part 5: Survey of Ocean Sound and Light Elements GB/T 12763:7 Marine survey specification Part 7: Exchange of marine survey data GB/T 12763:8 Specifications for marine surveys Part 8: Marine geological and geophysical surveys GB/T 12763:11 Specifications for Marine Survey Part 11: Marine Engineering Geological Survey

3 Terms and Definitions

The following terms and definitions apply to this document: 3:1 marine sediments The general term for loose state clastic materials such as sand, silt, and clay on the seabed: 3:2 The propagation speed and attenuation coefficient of sound waves in sediments: 3:3 Using the measuring probe installed with the acoustic transducer to penetrate into the seabed sediment, the speed of sound wave propagating in the sediment and the sound attenuation system are studied: The process of conducting field measurements: 3:4 vsed,f The speed at which sound waves of a certain frequency travel through sediments: Note: The unit is meter per second (m/s), f is the frequency of the sound wave: [Source: GB/T 12763:5-2007, 3:12, modified] ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 42643-2023_English be delivered?

Answer: Upon your order, we will start to translate GB/T 42643-2023_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 42643-2023_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 42643-2023_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.