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GB/T 1859.4-2025 English PDF

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US$444.00 · In stock
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GB/T 1859.4-2025: Reciprocating internal combustion engines - Measurement of sound power level using sound pressure - Part 4: Survey method for use in situ
Status: Valid

GB/T 1859.4: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 1859.4-2025	444	Add to Cart	4 days	Reciprocating internal combustion engines - Measurement of sound power level using sound pressure - Part 4: Survey method for use in situ	Valid
GB/T 1859.4-2017	419	Add to Cart	4 days	Reciprocating internal combustion engines -- Measurement of sound power level using sound pressure -- Part 4: Survey method using a reference sound source	Valid

Similar standards

GB/T 1859.1 GB/T 1859.2 JB/T 11880.2 GB/T 23337 GB/T 1859.3 GB/T 4759

Basic data

Standard ID: GB/T 1859.4-2025 (GB/T1859.4-2025)
Description (Translated English): Reciprocating internal combustion engines - Measurement of sound power level using sound pressure - Part 4: Survey method for use in situ
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J93
Classification of International Standard: 27.020; 17.140.20
Word Count Estimation: 22,225
Date of Issue: 2025-08-01
Date of Implementation: 2026-02-01
Older Standard (superseded by this standard): GB/T 1859.4-2017
Issuing agency(ies): State Administration for Market Regulation, Standardization Administration of China

GB/T 1859.4-2025: Reciprocating internal combustion engines - Measurement of sound power level using sound pressure - Part 4: Survey method for use in situ

---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT1859.4-2025
ICS 27.020;17.140.20 CCSJ93 National Standard of the People's Republic of China Replaces GB/T 1859.4-2017 Determination of sound power level of reciprocating internal combustion engines using the sound pressure method Part 4.Simple method for field measurement Released on August 1, 2025, implemented on February 1, 2026 State Administration for Market Regulation The National Standardization Administration issued

Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms, definitions and symbols 1 3.1 Terms and Definitions 1 3.2 Symbol 2 4 Acoustic Environment 3 4.1 General Principles 3 4.2 Background noise criteria 3 5 Measuring instruments 3 5.1 General Principles 3 5.2 Calibration 3 5.3 Use 3 6 Working Conditions 4 6.1 Engine Condition 4 6.2 Operating Conditions 4 7 Measurement 4 7.1 General Principles 4 7.2 Measurement uncertainty 4 7.3 Reference Body 4 7.4 Measuring distance 5 7.5 Measuring Surface 5 7.6 Microphone Position 7 7.7 Microphone location suitability criteria 9 7.8 Standard Sound Source 10 8 Calculation 12 8.1 General Principles 12 8.2 Calculation of the standard deviation of the mean sound pressure level 12 8.3 Calculation of sound power level 12 9 Test Report 13 9.1 General Principles 13 9.2 Record content 14 Reference 15 Preface 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. This document is Part 4 of GB/T 1859 “Reciprocating internal combustion engines - Determination of sound power levels by the sound pressure method”. The following parts are published. --- Part 1.Engineering law; --- Part 2.Simple method; --- Part 3.Semi-anechoic chamber precision method; --- Part 4.Simple method for field measurement. This document replaces GB/T 1859.4-2017 "Reciprocating internal combustion engines - Determination of sound power levels by sound pressure method - Part 4.Using standard sound pressure level Compared with GB/T 1859.4-2017, in addition to structural adjustments and editorial changes, the main technical changes are as follows. --- Changed "Terms and Definitions" and added symbols (see Chapter 3, Chapter 3 of the.2017 edition); --- Deleted "Criteria for acoustic suitability of the test environment" (see 4.3 of the.2017 edition); --- Changed "Working Conditions" (see Chapter 6, Chapter 6 of the.2017 edition); --- Changed "Measurement distance" (see 7.4, 7.4 of the.2017 edition); --- Changed the "Microphone location suitability criteria" (see 7.7, 7.7 of the.2017 edition). This document is equivalent to ISO 6798-3.2022 "Reciprocating internal combustion engines - Determination of sound power levels by sound pressure method - Part 3.Field measurements" "Simplified Method". The following minimal editorial changes have been made to this document. --- In order to coordinate with the existing standard, the name of the standard is changed to "Determination of sound power level of reciprocating internal combustion engines by sound pressure method Part 4. A Simple Method for Field Measurement. 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 by the China Machinery Industry Federation. This document is under the jurisdiction of the National Technical Committee for Standardization of Internal Combustion Engines (SAC/TC177). This document was drafted by. Commercial Vehicle Technology Center of SAIC Motor Corporation Limited, Shanghai Motor Vehicle Inspection and Certification Technology Research Center Co., Ltd., Ningbo Geely Luoyou Engine Parts Co., Ltd., Tianjin Internal Combustion Engine Research Institute (Tianjin Motorcycle Technology Center), FAW Jiefang Wuxi Diesel Engine Factory of Automobile Co., Ltd., Guangxi Yuchai Machinery Co., Ltd., Weichai Power Co., Ltd., Shanghai New Energy Automobile Co., Ltd. Technology Co., Ltd., Wuxi Weifu Lida Catalytic Converter Co., Ltd., Tongji University, and China North Engine Research Institute. The main drafters of this document are. Qiao Liangliang, Zhao Rutao, Sun Xudong, Song Endong, Hu Aihua, Yuan Weiping, Huang Chengxiang, Jing Yabing, Wang Yijiang, Xu Chao, Li Zhijie, Jia Yatao, Wang Haiyan, Yang Kai, Zhou Yi, Sun Fengjiao, and Deng Yulin. This document was first published in.2017 and this is the first revision.

introduction

The sound power level measurement results are basically independent of the test environment and the installation conditions of the sound source. This is the use of sound power level to characterize various types of machines and An important cause of equipment noise radiation. Sound power level is used for the following purposes. --- Indication of the machine radiated noise under specified conditions; ---Verification of noise label value; --- Comparison of radiated noise of machines of various models and sizes; --- Comparison with the noise limits specified in the purchase contract or specification; --- Development of engineering measures to reduce machine radiated noise (generally, the frequency band sound power level is also required); --- Prediction of noise sound pressure level at specified locations. GB/T 1859 "Determination of sound power level of reciprocating internal combustion engines by sound pressure method" is a guide to measure the sound power level of reciprocating internal combustion engines by measuring the sound power level on the measurement surface of the envelope sound source. The standard for calculating sound power level based on pressure level is designed to obtain sound power level measurement results with a specified accuracy level and consists of four parts. --- Part 1.Engineering method. The purpose is to obtain the sound power level measurement results of Class 2 accuracy level, which can be used for acceptance test and also Can be used to formulate engineering measures. --- Part 2.Simple method. The purpose is to obtain sound power level measurement results with a level 3 accuracy level, which can be used for comparative tests. --- Part 3.Semi-anechoic chamber precision method. The purpose is to obtain the sound power level measurement results of Class 1 accuracy level, which can be used for calibration The test can also be used to formulate engineering measures. --- Part 4.Simple method for field measurement. The purpose is to obtain the sound power level measurement results of level 3 accuracy, which can be used for comparison test. Table 1 gives three accuracy levels of sound power level determination methods, the measurement results are accurate to 0.1dB. The A-weighted sound power level can be measured with an accuracy of Class 3. Table 2 gives the measurement uncertainty limits of sound power level (upper limit of reproducibility standard deviation). They reflect the overall measurement uncertainty. The total effect is not included, but the sound power level changes caused by factors such as the installation conditions and operating conditions of the measured sound source are excluded. In the noise control of reciprocating internal combustion engines, relevant parties (including manufacturers, installers and users, etc.) should conduct effective Only when clear acoustic quantities are obtained under the specified measurement conditions and the specifications of this document are used, can the acoustic information be effectively communicated. Therefore, when selecting these standards, the noise measurement purpose and measurement conditions should be taken into consideration. Make the best choice. Table 1 Sound power level measured by sound pressure method specified in GB/T 1859 series standards parameter GB/T 1859.1 Engineering Law Level 2 GB/T 1859.2 Simple method Level 3 GB/T 1859.3 Semi-anechoic chamber precision method Level 1 GB/T 1859.4 Simple method for on-site measurement Level 3 Reference standards ISO 3744 ISO 3746 ISO 3745 ISO 3747 Test environment 1 reflective surface Approximate free field above 1 reflective surface Sound field above 1 reflective surface Sound field above Sound field with multiple reflecting surfaces Sound source volume Unlimited, depends on Test environment Unlimited, depends on Test environment Better than test 0.5% of the room volume Unlimited, depends on the test environment Table 1 Sound power levels measured by the sound pressure method specified in the GB/T 1859 series of standards (continued) parameter GB/T 1859.1 Engineering Law Level 2 GB/T 1859.2 Simple method Level 3 GB/T 1859.3 Semi-anechoic chamber precision method Level 1 GB/T 1859.4 Simple method for on-site measurement Level 3 Background noise criterion a ΔLpA≥6.0dB K1A≤1.3dB ΔLpA≥3.0dB K1A≤3.0dB ΔLpA≥10.0dB K1A≤0.5dB ΔLpA≥3.0dB K1A≤3.0dB Test environment acoustics Suitability criteria K2A≤4.0dB K2A≤7.0dB Special requirements Special requirements Proper microphone position Sexual Standards b s(L'pAm)≤1.0dB s(L'pAm)≤ 2dB s(L'pAm)≤1/2dB s(L'pAm)≤2.0dB Measuring instruments Sound Level Meters/Filters/Sound Calibrators Level 1/Level 1/Level 1Level 2/Level 2/Level 1Level 1/Level 1/Level 1Level 2/Level 2/Level 1 Available sound power levels A-weighted or A-weighted in frequency bands use Sound power level acceptance test; Development of engineering measures Sound power level comparison test Sound power level calibration test; Development of engineering measures Sound power level comparison test Note. K1A. Background noise correction. K2A. Environmental correction. ΔLpA. The difference between the surface sound pressure level measured when the sound source being measured is working and the background noise sound pressure level. s(L'pAm). Standard deviation of the mean sound pressure level. a For background noise correction, see 8.3.2. b For the criteria for suitability of microphone location, see 7.7. c Instrument requirements, calibration and use are described in Chapter 5. Table 2 Uncertainty limits for sound power level measurement (upper limit of reproducibility standard deviation) Center frequency Hz Octave 1/3 octave GB/T 1859.3 Reproducibility standard deviation dB GB/T 1859.1 Reproducibility standard deviation dB GB/T 1859.2 Reproducibility standard deviation dB GB/T 1859.4 Reproducibility standard deviation dB 63 50~80 2.0 5.0 125 100~160 1.5 3.0 250.200~315 1.5 2.0 500 400~630 1.5 1.5 1000~4000 800~5000 1.0 1.5 8000 6300~10000 1.5 2.5 A weighting 1.0 1.5 3.0 4.0 Determination of sound power level of reciprocating internal combustion engines using the sound pressure method Part 4.Simple method for field measurement 1 Scope This document specifies the method for determining the sound power level of reciprocating internal combustion engines - a simplified method for field measurements. This document applies to reciprocating internal combustion engines within the scope of ISO 3046-1 and to other internal combustion engines for which no appropriate standard exists. Note. In this document, unless otherwise specified, reciprocating internal combustion engine is referred to as "engine". 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. ISO 3046-1 Reciprocating internal combustion engines — Performance — Part 1.Calibration and test methods for power, fuel consumption and oil consumption Note. GB/T 6072.1-2008 Reciprocating internal combustion engine performance Part 1.Calibration and test methods for power, fuel consumption and oil consumption General Additional requirements for engines (ISO 3046-1.2002, IDT) ingmethod) ISO 6926 Acoustics - Requirements for the performance and calibration of standard sound sources for the determination of sound power levels power levels) Note. GB/T 4129-2003 Acoustics Performance and calibration requirements for standard sound sources used in sound power level determination (ISO 6926.1999, IDT) IEC 60942 Electroacoustics-Soundcalibrators Note. GB/T 15173-2010 Electroacoustic sound calibrators (IEC 60942.2003, IDT) IEC 61260-1 Electroacoustics - Octave-band and fractional-octave-band filters - Part 1.Specifications IEC 61672-1 Electroacoustics-Soundlevelmeters-Part 1.Specification Specifications) Note. GB/T 3785.1-2023 Electroacoustics Sound Level Meters Part 1.Specification (IEC 61672-1.2013, IDT) 3 Terms, definitions and symbols 3.1 Terms and Definitions For this document, the terms and definitions defined in ISO 3046-1, ISO 6798-1, IEC 61260-1, IEC 61672-1 and the following apply. ......

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Question 1: How long will the true-PDF of GB/T 1859.4-2025_English be delivered?

Answer: Upon your order, we will start to translate GB/T 1859.4-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 2 ~ 4 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 1859.4-2025_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 1859.4-2025_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.

Question 5: Should I purchase the latest version GB/T 1859.4-2025?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 1859.4-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.