GB/T 5170.22-2024 English PDFUS$359.00 · In stock
Delivery: <= 4 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 5170.22-2024: Inspection methods environmental testing equipment - Part 22: The equipment for acoustic vibration test in reverberation field Status: Valid
Basic dataStandard ID: GB/T 5170.22-2024 (GB/T5170.22-2024)Description (Translated English): Inspection methods environmental testing equipment - Part 22: The equipment for acoustic vibration test in reverberation field Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: K04 Classification of International Standard: 19.040 Word Count Estimation: 18,146 Date of Issue: 2024-09-29 Date of Implementation: 2025-04-01 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 5170.22-2024: Inspection methods environmental testing equipment - Part 22: The equipment for acoustic vibration test in reverberation field---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. Inspection methods environmental testing equipment - Part 22.The equipment for acoustic vibration test in reverberation field Environmental test equipment inspection methods Part 22.Reverberation field test equipment for acoustic vibration testing Inspection methods environmental testing equipment- Part 22.The equipment for acoustic vibration test in reverberation field ICS 19.040 CCS K 04 National Standard of the People's Republic of China Released on 2024-09-29 2025-04-01 Implementation State Administration for Market Regulation The National Standardization Administration issued Table of ContentsPreface ... Ⅲ Introduction Ⅳ 1 Scope ... 1 2 Normative references ... 1 3 Terms and Definitions ... 1 4 Composition and Principle ... 2 5 Inspection Items ... 2 6 Test conditions ... 2 6.1 Environmental Conditions 2 6.2 Inspection instruments and equipment ... 3 7 Inspection methods ... 3 7.1 Preparation before inspection 3 7.2 Sound spectrum shaping characteristics test 3 7.3 Sound pressure level indication error test ... 4 7.4 Maximum total sound pressure level test 5 7.5 Sound pressure change test of reverberation field working space ... 6 7.6 Reverberation time test ... 6 7.7 Minimum usable frequency test 7 7.8 Environmental Noise Inspection ... 7 8 Inspection results and inspection cycle 7 8.1 Test results 7 8.2 Inspection cycle ... 8 Appendix A (Informative) Description of measurement uncertainty in inspection 9 A.1 Calculation of expanded measurement uncertainty (U) 9 A.2 Uncertainty Analysis of Sound Pressure Level Measurement Results 11 References ... 13 Figure 1 Schematic diagram of the composition of the reverberation field test equipment for acoustic vibration test Figure 1 ... 2 Figure 2 1/3 octave spectrum used to test the sound spectrum shaping ability ... 4 Figure 3 Schematic diagram of the positions of 16 measurement microphones ... 5 Figure 4 Schematic diagram of the positions of 8 measurement microphones ... 6 Table 1 Reverberation field test equipment inspection items Table 1 ... 2 Table 2 1/3 octave band sound pressure level spectrum ... 4 Table 3 Reference relationship between minimum test center frequency and reverberation field volume ... 7 Table A.1 Sound pressure level measurement uncertainty components table ... 12ForewordThis 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 is required. This document is part 22 of GB/T 5170.GB/T 5170 has published the following parts. Test methods for environmental test equipment for electrical and electronic products Part 1.General (GB/T 5170.1-2016); Environmental test equipment test methods Part 2.Temperature test equipment (GB/T 5170.2-2017); - Test methods for environmental test equipment for electrical and electronic products Part 5.Damp heat test equipment (GB/T 5170.5-2016); - Environmental test equipment test methods Part 8.Salt spray test equipment (GB/T 5170.8-2017); - Environmental test equipment test methods Part 9.Solar radiation test equipment (GB/T 5170.9-2017); - Environmental test equipment test methods Part 10.High, low temperature and low pressure test equipment (GB/T 5170.10-2017); - Environmental test equipment test methods Part 11.Corrosive gas test equipment (GB/T 5170.11-2017); - Environmental test equipment test methods Part 13.Mechanical vibration system for vibration (sinusoidal) test (GB/T 5170.13- 2018); Environmental test equipment test methods Part 14.Electrodynamic vibration system for vibration (sinusoidal) test (GB/T 5170.14- 2023); Environmental test equipment test methods Part 15.Hydraulic vibration system for vibration (sinusoidal) test (GB/T 5170.15- 2018); Environmental test equipment test methods Part 16.Centrifuge for steady-state acceleration test (GB/T 5170.16-2018); - Basic parameter verification method of environmental test equipment for electrical and electronic products Low temperature/low pressure/humid heat comprehensive sequential test equipment (GB/T 5170.17-2005); Environmental test equipment test methods Part 18.Temperature/humidity combined cycle test equipment (GB/T 5170.18-2022); - Environmental test equipment test methods Part 19.Temperature, vibration (sinusoidal) comprehensive test equipment (GB/T 5170.19- 2018); Environmental test equipment test methods Part 20.Water test equipment (GB/T 5170.20-2022); - Environmental test equipment test methods Part 21.Hydraulic vibration system for vibration (random) test (GB/T 5170.21- 2023); Environmental test equipment test methods Part 22.Reverberation field test equipment for acoustic vibration testing (GB/T 5170.22- 2024). 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 proposed and coordinated by the National Technical Committee for Standardization of Environmental Conditions and Environmental Testing for Electrical and Electronic Products (SAC/TC 8). This document was drafted by. Beijing Satellite Environmental Engineering Research Institute, the Fifth Institute of Electronics of the Ministry of Industry and Information Technology, Beijing Intensity Environmental Research Institute Institute, Guangzhou Fifth Institute Environmental Instrument Co., Ltd. The main drafters of this document are. Xiang Shuhong, Fang Guiqian, Zhang Jungang, Li Xinming, Geng Liyan, Ji Chunyang, Wang Zhipeng, Wei Bingfeng, Qi Jianglong, Shen Zhiqiang and Zhang Wenbing.IntroductionGB/T 5170 "Test methods for environmental testing equipment" is mainly applicable to GB/T 2423 "Environmental testing Part 2.Test methods" The purpose of the inspection of test equipment used in some standards and similar test method standards is to confirm whether the test equipment meets the test method. GB/T 5170 is intended to consist of the following parts. Part 1.General. The purpose is to specify the general terms, inspection conditions, inspection cycles, etc. for environmental test equipment inspection. Require. Part 2.Temperature test equipment. The purpose is to specify the inspection methods of temperature (including low temperature, high temperature and temperature change) test equipment. Laws and related requirements. Part 5.Wet heat test equipment. The purpose is to specify the inspection methods and related requirements of wet heat test equipment. - Part 8.Salt spray test equipment. The purpose is to specify the inspection methods and related requirements of salt spray test equipment. - Part 9.Solar radiation test equipment. The purpose is to specify the inspection methods and related requirements for solar radiation test equipment. - Part 10.High, low temperature and low pressure test equipment. The purpose is to specify high, low temperature and low pressure (including low pressure, low temperature and high pressure) Inspection methods and related requirements for (temperature and low pressure) test equipment. Part 11.Corrosive gas test equipment. The purpose is to specify the inspection methods and related requirements for corrosive gas test equipment. - Part 13.Mechanical vibration systems for vibration (sinusoidal) tests. The purpose is to specify mechanical vibration systems for vibration (sinusoidal) tests. Inspection methods and related requirements for dynamic systems. Part 14.Electrodynamic vibration systems for vibration (sinusoidal) tests. System inspection methods and related requirements. Part 15.Hydraulic vibration system for vibration (sinusoidal) test. The purpose is to specify the hydraulic vibration system for vibration (sinusoidal) test. Inspection methods and related requirements for dynamic systems. Part 16.Centrifuges for steady-state acceleration tests. The purpose is to specify the inspection methods and related About requirements. Part 17.Low temperature/low pressure/humid heat comprehensive sequence test equipment. The purpose is to specify the low temperature/low pressure/humid heat comprehensive sequence test equipment. Inspection methods and related requirements for inspection equipment. Part 18.Temperature/humidity combined cycle test equipment. The purpose is to specify the inspection method of temperature/humidity combined cycle test equipment. Laws and related requirements. Part 19.Temperature, vibration (sinusoidal) comprehensive test equipment. The purpose is to specify the temperature, vibration (sinusoidal) comprehensive test equipment Equipment inspection methods and related requirements. Part 20.Water testing equipment. The purpose is to specify the inspection methods and related requirements for water testing equipment. - Part 21.Hydraulic vibration system for vibration (random) test. The purpose is to specify the hydraulic vibration system for vibration (random) test. System inspection methods and related requirements. Part 22.Reverberation field test equipment for acoustic vibration tests. The purpose is to specify the inspection methods and Related requirements. The test method given in this document is mainly used for the test of the reverberation field test equipment used in GB/T 2423.47. The equipment is an environmental test equipment used to generate high-intensity noise excitation, and is used to conduct noise tests on test pieces under pre-specified conditions. For the purpose of standardization, the test results are usually independent of the type of test system, and the test method is the basic means of quality characterization, reliable and consistent The test method is the guarantee of comparability of test data. According to the test requirements of GB/T 2423.47, this document provides the reverberation field test for acoustic vibration test. The inspection method of the equipment is specified. Environmental test equipment inspection methods Part 22.Reverberation field test equipment for acoustic vibration testing1 ScopeThis document specifies the inspection items, inspection conditions, and inspection requirements of the reverberation field test equipment for acoustic vibration testing during the initial inspection and periodic inspection. Test methods, test results and test cycles. This document is applicable to the inspection of basic parameters of reverberation field test equipment for acoustic vibration testing in accordance with GB/T 2423.47-2018.2 Normative referencesThe 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. in this document. GB/T 2423.47-2018 Environmental testing Part 2.Test methods Test Fg. Acoustic vibration GB/T 4129-2003 Acoustics Performance and calibration requirements for standard sound sources used in sound power level determination GB/T 5170.1-2016 Test methods for environmental test equipment for electrical and electronic products Part 1.General GB/T 15173-2010 Electroacoustic sound calibrator JJF 1288 Multi-channel sound analyzer calibration specification3 Terms and definitionsThe terms and definitions defined in GB/T 5170.1-2016 and the following apply to this document. 3.1 Reverberation time (Indoor acoustic parameter) The amount by which the average sound energy density decays by one millionth (60 dB) from its original value after the sound reaches a steady state and the sound source is stopped. The time required. Note 1.The unit of reverberation time is second (s). NOTE 2 The reverberation time for a 60 dB decrease in sound pressure level can be derived by linear extrapolation for a shorter range of values, but the results are marked accordingly. The reverberation time derived from the decay curve between the two points in time when the pressure level first decreases to 5 dB and 25 dB below the original value, denoted as T20; based on The reverberation time derived from the decay curve between the points in time when the sound pressure level first decreases by 5 dB and 35 dB below the original value is labeled T30. [Source. GB/T 36075.2-2018, 3.5] 3.2 minimum usable frequency There are at least 7 acoustic modes with center frequencies in the lowest 1/3 octave band. 3.3 space variation Sv The variation of sound pressure level at different locations in the reverberation field working space. Note. It is usually expressed as the standard deviation of the sound pressure level. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 5170.22-2024_English be delivered?Answer: Upon your order, we will start to translate GB/T 5170.22-2024_English as soon as possible, and keep you informed of the progress. 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