AS 3782.4-1990

Acoustics - Statistical methods for determining and verifying stated noise emission values of machinery and equipment Methods for stated values for batches of machines

Standards Australia

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1 - AS 3782.4-1990 ACOUSTICS-STATISTICAL METHODS FOR DETERMINING AND VERIFYING STATED NOISE EMISSION VALUES OF MACHINERY AND...
4 - PREFACE
5 - CONTENTS
6 - 0 Introduction
6 - 1 Scope and field of application
6 - 2 References
6 - 3 Definitions
6 - 4 General
7 - 5 Guidelines for the determination of the labelled value, Lc, by the labeller
8 - 6 Verifying the labelled value for a batch of machi nes
8 - 6.1 General
8 - 6.2 Single sampling inspection
9 - 6.3 Double sampling inspection
9 - 6.4 Sequential sampling inspection
10 - 7 Information to be given in a specific labelling code for a specific family of machines
11 - Annex A - Operating characteristic and examples of single, double and sequential sampling
11 - A.1 General
11 - A.2 Operating characteristic curves (OCs)
12 - A.3 Guidelines for the selection of an appropriate sample size
12 - A.4 Examples of single, double and sequential sampl ing inspection
14 - Annex B - Guidelines for estimating standard deviations and for the use of operating characteristic curves
14 - B.1 General
14 - B.2 Example of the estimation of the standard deviation of reproducibility, the standard deviation of production and the...
16 - B.3 Example of the use of the operating characteristic curves (OCs) when labelling

Abstract

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.

Scope

This part of ISO 7574 provides guidelines for determining the labelled value, Lc, by the labeller and specifies statistical sampling procedures for verifying compliance of the noise emissions of a batch (lot) of machinery and equipment with its labelled value.

This part of ISO 7574 is intended to assist those parties responsible for drawing up specific labelling codes for specific families of machines. It is also intended to be of use to labellers who want their batches of machines to conform with verification procedures that are in accordance with the specifications given in the specific labelling codes based on clause 7.

This part of ISO 7574 does not deal with the consequences that ensue if the stated value is not confirmed as verified for a batch (lot) of machines.