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GB/T 34388-2017: Foundry machinery -- Noise measurement method of sound power levels
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 34388-2017 | English | 439 |
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Foundry machinery -- Noise measurement method of sound power levels
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GB/T 34388-2017
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Basic data | Standard ID | GB/T 34388-2017 (GB/T34388-2017) | | Description (Translated English) | Foundry machinery -- Noise measurement method of sound power levels | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J61 | | Classification of International Standard | 25.120.30 | | Word Count Estimation | 22,258 | | Date of Issue | 2017-09-29 | | Date of Implementation | 2018-04-01 | | 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 | GB/T 34388-2017: Foundry machinery -- Noise measurement method of sound power levels---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.
Foundry machinery - Noise measurement method of sound power levels
ICS 25.120.30
J61
National Standards of People's Republic of China
Foundry machinery noise power level measurement method
2017-09-29 Posted
2018-04-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
China National Standardization Administration released
Foreword
This standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This standard is proposed by the China Machinery Industry Federation.
This standard by the National Foundry Machinery Standardization Technical Committee (SAC/TC186) centralized.
The main drafting units of this standard. Jinan Foundry Forging Machinery Co., Ltd., Qingdao Foundry Machinery Co., Ltd., Qingdao Aetna Heavy Industry
Machinery Co., Ltd., Fujian Min-spin Technology Co., Ltd., Qingdao Chi-tai Machinery Co., Ltd., Guangdong Science and Technology Extension Limited
the company.
The main drafters of this standard. Lu Jun, Xing Haiwei, Ding Renxiang, Zhu Bin, Duan Jin Ting, Chen Party.
Foundry machinery noise power level measurement method
1 Scope
This standard specifies the casting machinery noise power level measurement methods of terms and definitions, the amount to be measured and measurement uncertainty, measurement to
Seeking, measuring methods, calculation of noise power levels, recording and reporting.
This standard applies to radiation steady-state, non-steady-state noise casting machinery.
This standard does not apply to the radiation impulse noise casting machinery.
Note. The characteristics of the noise classification (steady state, unsteady state, pulse, etc.), see GB/T 14259;
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 3102.7 Acoustics volume and units
GB/T 3241 electro-acoustic octave and fractional octave filters
GB/T 3785.1 Electroacoustic sound level meter Part 1. Specification
GB/T 3785.2 Electroacoustics sound level meter Part 2. Type evaluation test
GB/T 3947 Acoustics terminology
GB/T 4129 Acoustics Standard sound source performance and calibration requirements for sound power level determination
3 Terms and definitions
GB/T 3947 and GB/T 3102.7 defined by the following terms and definitions apply to this document.
3.1
Measurement surface measurementsurface
Enveloping sound source with an area of S, an imaginary geometric surface on which the measuring point is located.
3.2
Reference body referencebox
The smallest rectangular parallelepiped imaginary surface that happens to envelope the sound source and terminates in one or more reflective surfaces.
3.3
Measurement distance measurementdistance
The vertical distance between the reference and the box measuring surface.
3.4
Background noise backgroundnoise
Noise from all other sources other than the sound source under test.
3.5
Background noise correction backgroundnoisecorrection
K1
A correction term introduced by the effect of background on the surface sound pressure level in decibels (dB). K1 is related to frequency and is based on A's statutory power
K1A said with the case.
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