GB/T 17483.1-2024 (GB/T 17483-1998) PDF EnglishUS$120.00 · In stock · Download in 9 seconds
GB/T 17483-1998: Test code for the determination of airborne noise level of hydraulic pumps Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Obsolete GB/T 17483: Historical versions
Similar standardsGB/T 17483-1998: Test code for the determination of airborne noise level of hydraulic pumps---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/GBT17483-1998GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 23.100.10; 17.140.20 J 20 eqv ISO 4412-1.1991 Test Code for the Determination of Airborne Noise Level of Hydraulic Pumps Issued on: SEPTEMBER 2, 1998 Implemented on: AUGUST 1, 1999 Issued by. State Bureau of Quality and Technical Supervision Table of ContentsForeword... 3 ISO Foreword... 4 Introduction... 5 1 Scope... 6 2 Normative References... 6 3 Definitions... 6 4 Measurement Uncertainty... 7 5 Test Environment... 7 6 Measurement Instruments... 7 7 Installation Conditions of Pump... 8 8 Operating Conditions... 9 9 Location and Number of Noise Measurement Points... 9 10 Test Procedures... 10 11 Test Report... 11 Appendix A (Standard Appendix) Calculation of Sound Pressure Level and Sound Power Level... 14 Appendix B (Standard Appendix) Measurement Level and Uncertainty... 17 Appendix C (Standard Appendix) Location and Number of Noise Measuring Points... 18 Appendix D (Standard Appendix) Correction Value of Background Noise’s Sound Pressure Level... 20ForewordThis Standard equivalently adopts international standard ISO 4412-1.1991 Hydraulic Fluid Power; Test Code for Determination of Airborne Noise Levels - Part 1.Pumps. This Standard’s technical content remains unchanged with ISO 4412-1.1991, while its narration is different from ISO 4412-1.1991.Since the referenced standard describes the acoustic test methods and instruments in details, thus some guidance appendix in ISO 4412-1.1991 shall not be used in this Standard. For ease of use, the calculation of A-weighted average sound pressure level and sound power level are additionally described in details. The terminology, quantity, quantifier name, and symbols adopted by this Standard are consistent with GB/T 3947-1996 Acoustical terminology, GB/T 3102.7-1993 Quantities and Units-Acoustics, and other relevant national acoustic provisions. This Standard‘s Appendixes A, B, C, D are standard appendixes. This Standard was proposed by the Ministry of Machine-Building Industry. This Standard shall be under the jurisdiction of National Hydraulic Pneumatic Standardization Technical Committee. Drafting organizations of this Standard. Ministry of Machine-Building Industry of Guangzhou Machine Tools Institute. Chief drafting staff of this Standard. Min Xinhe. This Standard shall be responsibly interpreted by Guangzhou Machine Tools Institute of Ministry of Machine-Building Industry. Test Code for the Determination of Airborne Noise Level of Hydraulic Pumps1 ScopeThis Standard specifies, under the steady state conditions, the test code for the determination of airborne noise level of hydraulic pumps (hereinafter refers to pumps). This Standard is applicable to measurement pump’s A-weighted sound power level, pump octave band (center frequency is 125~8000Hz) sound power level.2 Normative ReferencesThe following standards contain the provisions which, through reference in this Standard, constitute the provisions of this Standard. At the time of publication, the editions indicated are valid. All standards are subject to revision. The parties who are using this Standard shall explore the possibility of using the latest version of the following standards. GB/T 3767-1996 Acoustics - Determination of Sound Power Levels of Noise Sources Using Sound Pressure - Engineering Method in an Essentially Free Field over a Reflecting Plane GB 3785-83 Electric, Sonic Properties and Measuring Methods for Sound Level Meters GB/T 3947-1996 Acoustical Terminology GB 6882-86 Acoustics-Determination of Sound Power Levels of Noise Sources-Precision Methods for Anechoic and Semi-Anechoic Rooms JB/T 7861-1995 1/1 and 1/3 Octave Band Filters for the Analysis of Sounds and Vibrations3 DefinitionsThis Standard adopts the following definitions and the ones stipulated in GB/T 3927. 3.1 Free filed over a reflecting planeAppendix D(Standard Appendix) Correction Value of Background Noise’s Sound Pressure Level K1 value in Table D1 indicates the correction value that shall be deducted from the sound pressure level measured when the pump under test is running. Table D1 Correction value K1 of Background Noise’s Sound Pressure Level dB Determination Difference between sound pressure level and background noise sound pressure level measured during he running period of the pump under test < 6 6 7 8 9 10 >10 Semi-anechoic room determination, K1 Invalid measurement 1.30 1.00 0.80 0.60 0.40 0 Free field over reflecting plane determination, K1 Invalid measurement 1.00 1.00 1.00 0.50 0.50 0 ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. |
