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GB/T 23282-2009 English PDF

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GB/T 23282-2009: Metal forming machinery -- Noise measurement method of sound power levels
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PDF similar to GB/T 23282-2009


Standard similar to GB/T 23282-2009

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Basic data

Standard ID GB/T 23282-2009 (GB/T23282-2009)
Description (Translated English) Metal forming machinery -- Noise measurement method of sound power levels
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J62
Classification of International Standard 25.120.10
Word Count Estimation 16,12
Date of Issue 2009-03-16
Date of Implementation 2009-11-01
Adopted Standard ISO 3746-1995, NEQ
Regulation (derived from) National Standard Approval Announcement 2009 No.2 (Total No.142)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the measurement of sound pressure level in the envelope forging machinery for measuring surface sound source to calculate forging machinery sound power level approach. Also given acoustic environment, measuring instruments and methods of computation and use of surface sound pressure level and sound power level. This standard specifies the method applies only to the specified action when the specification is "steady state" and "non- steady state" of forging machinery noise measurements, does not apply to the specified action when the specification is radiation " pulse" of forging machinery noise noise measurement. Compliance with applicable requirements of a reflective surface indoor and outdoor environments.

GB/T 23282-2009: Metal forming machinery -- Noise measurement method of sound power levels

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Metal forming machinery. Noise measurement method of sound power levels ICS 25.120.10 J62 National Standards of People's Republic of China Forging machinery sound power level measurement (ISO 3746.1995, NEQ) Posted 2009-03-16 2009-11-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

This standard and the international standard ISO 3746.1995 "using sound pressure Determination of sound power levels of noise sources using an enveloping surface reflection Measuring surface simple method "of non-equivalent. This standard Annex A, Annex B is normative appendix. The standard proposed by China Machinery Industry Federation. This standard by the National Forging Machinery Standardization Technical Committee. This standard was drafted. Taiyuan University of Science and Technology, Jinan Foundry and Metalforming Machinery Research Institute, Changzhi City Kewei Forming Machinery Technology Co., Ltd. The main drafters of this standard. Li Yongtang, CAO new, sharp clothes, Li Shiping. Forging machinery sound power level measurement

1 Scope

This standard specifies the sound pressure level measured at the upper envelope forging machinery measuring surface sound source to calculate the forging machinery sound power level of the party law. Also given acoustic environment, and the use of measuring instruments and the calculation of surface sound pressure level and sound power level. The method specified in this standard apply only to the actions specified in a "steady state" and "unsteady" forging machinery noise measurement specification without When applied to a predetermined action norms radiation forging machinery noise measurement "pulse" noise. Having a reflective surface suitable for regulatory compliance Given the requirements of indoor and outdoor environments. NOTE. Noise Classification (steady, non-steady-state, quasi-steady state, pulse, etc.) see GB/T 14259.

2 Normative references

The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 3102.7 acoustic quantity and unit (GB/T 3102.7-1993, eqvISO 31-7.1992) GB/T 3785-1983 electric sound level meter, acoustic performance and test methods GB/T 3947 Acoustics Terminology GB/T 14259 Acoustics - Measurement of noise on the air and its effects on human evaluation criteria guidelines (GB/T 14259- 1993, neqISO 2204. 1979) GB/T 15173 acoustic calibrator (GB/T 15173-1994, eqvIEC 60942. 1988) GB/T 17181-1997 integrated average sound level (idtIEC 60804. 1985)

3 Terms and Definitions

GB/T 3947 and GB/T 3102.7 and established the following terms and definitions apply to this standard. 3.1 Yan Lp All microphone positions on the measurement surface time average sound pressure level of the average energy plus the background noise correction K1 and environmental correction K2, single Bit dB. 3.2 Enveloping sound source area S, the measuring point is located on an imaginary geometric surface. Measuring surface terminates in one or more reflective surfaces. 3.3 In general, the frequency range of the test, including the center frequency of octave band of 125Hz ~ 8000Hz. 3.4 Envelope just a sound source and terminates in one or more of the reflective surface of the smallest rectangle parallelepiped imaginary surface. 3.5

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