SIST EN 27574-4:1997

Name: SIST EN 27574-4:1997 — 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 (ISO 7574-4:1985)
SKU: SIST EN 27574-4:1997
Price: 28800 RUB
Availability: InStock

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 (ISO 7574-4:1985)

Название (английский):

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 (ISO 7574-4:1985)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 16
Дата публикации:: 1 апреля 1997 г.
ICS:: 17.140.20
Технический комитет:: AKU - Acoustics

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Цена:28 800 ₽

Описание (английский):

Provides guidelines for determining the labelled value by the labeller and specifies statistical sampling procedures for checking compliance of noise emitted of a lot of machines with its labelled value. Does not deal with the consequences that ensue if the specified value is not confirmed as checked for a lot of machines.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN 27574-4:1988 (ISO 7574-4:1985) - published by CEN/ISO - defines statistical methods to determine and verify a labelled noise emission value for batches (lots) of machinery and equipment. It gives labellers guidelines to set a stated (labelled) upper noise value and specifies sampling procedures to check whether a lot complies with that value. The standard assumes noise emission values in a batch are approximately normally distributed and requires a specified reference standard deviation for verification. It does not cover the consequences or corrective actions if a lot fails verification.

Key topics and requirements

Purpose: Determine and verify a labelled (upper) noise emission value for batches of machines.

Assumptions: Noise values ≈ normal distribution; verification uses a reference standard deviation (σM).

Risk/acceptance basis: Procedures are designed so that a lot with at most 6.5% of items exceeding the labelled value has approximately 95% probability of acceptance (producer’s risk point).

Labelled-value guidance: Labellers are given formulae to set the labelled value (Lc) relative to measured mean and σM (examples and equations provided in the standard).

Sampling procedures: Three equivalent inspection methods are specified - single sampling, double sampling, and sequential sampling - each requiring a prescribed sample size and accept/reject criteria (using operating-characteristic concepts).

Reference information: Annexes include operating-characteristic curves, examples and guidance for estimating standard deviations and using OC curves.

Scope limits: Focuses on checking an upper limit only (one-sided). It does not prescribe actions after non-conformance.

Practical applications and users

Who uses this standard:

Manufacturers and labellers of mass-produced machinery and equipment who must declare noise emission values on labels or in documentation.

Testing laboratories and quality departments performing batch verification of noise emissions.

Certification bodies and regulators designing labelling codes or verification procedures for specific machine families.

Practical uses:

Setting a defensible, statistically based labelled noise limit for product families.

Designing sampling plans to verify compliance of lots with declared noise values.

Integrating verification rules into an organizational noise-labelling code (the code must specify σM, sampling method and sample sizes).

Related standards

ISO 7574-1 (general considerations and definitions)

ISO 3951 (sampling by variables - referenced procedure)

ISO 4871 (noise labelling of machinery and equipment)

EN 27574-4 is identical in content to ISO 7574-4:1985 and contains annexes with OC curves and symbol lists for practical implementation.

Keywords: acoustics standard, noise emission, machinery noise, statistical sampling, labelled value, batch verification, ISO 7574-4, EN 27574-4, sampling inspection, operating characteristic.

SIST EN 27574-4:1997

Abstract

Похожие стандарты

Overview

Key topics and requirements

Practical applications and users

Related standards

Технические детали

EN 27574-4:1988

Acoustics - Statistical methods for determining and verifying stated noise emission values of machinery and e…

ISO 7574-4:1985

Acoustics — Statistical methods for determining and verifying stated noise emission values of machinery and e…

SIST EN 27574-1:1997

Acoustics - Statistical methods for determining and verifying stated noise emission values of machinery and e…

BS ISO 3951-1:2022

Sampling procedures for inspection by variables. Part 1: Specification for single sampling plans indexed by a…

SIST EN ISO 4871:2009

Acoustics - Declaration and verification of noise emission values of machinery and equipment (ISO 4871:1996)