GB/T 17483.1-2024 (GB/T 17483-1998) PDF English
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Hydraulic fluid power - Test code for determination of noise level - Part 1: Hydraulic pumps
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Test code for the determination of airborne noise level of hydraulic pumps
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GB/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/GBT17483-1998
GB
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 Contents
Foreword... 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... 20
Foreword
This 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 Pumps
1 Scope
This 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 References
The 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
Vibrations
3 Definitions
This Standard adopts the following definitions and the ones stipulated in GB/T 3927.
3.1 Free filed over a reflecting plane
Appendix 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.
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