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AS 3782.4-1990

[Current]

Acoustics — Statistical methods for determining and verifying stated noise emission values of machinery and equipment, Part 4: Methods for stated values for batches of machines

This method provides guidelines for determining noise emission values of machinery and equipment for those labelling the devices, and specific statistical sampling procedures for verifying compliance of the noise emissions of a batch of equipment. Identical with and reproduced from ISO 7574-4:1985.
Published: 17/09/1990
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Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Introduction
1 Scope and field of application
2 References
3 Definitions
4 General
5 Guidelines for the determination of the labelled value, Lc, by the labeller
6 Verifying the labelled value for a batch of machines
6.1 General
6.2 Single sampling inspection
6.3 Double sampling inspection
6.4 Sequential sampling inspection
7 Information to be given in a specific labelling code for a specific family of machines
Annex A
A.1 General
A.2 Operating characteristic curves (OCs)
A.3 Guidelines for the selection of an appropriate sample size
A.4 Examples of single, double and sequential sampling inspection
A.4.1 Example of single sampling inspection (see 6.2)
A.4.2 Example of double sampling inspection (see 6.3)
A.4.3 Example of sequential sampling inspection (see 6.4)
Annex B
B.1 General
B.2 Example of the estimation of the standard deviation of reproducibility, the standard deviation of production and the total standard deviation in order to specify the reference standard deviation of the family of machines under consideration
B.2.1 Determination of the standard deviation of reproducibility
B.2.2 Determination of the standard deviation of production
B.2.3 Determination of the overall standard deviation
B.3 Example of the use of the operating characteristic curves (OCs) when labelling (see figure 3)
Annex C
Bibliography
Cited references in this standard
Content history