SIST EN 27574-2:1997

• Abstract:

  Provides quidelines for determining the labelled values of the noise emitted by individually-labelled machines, that is in the situation in which each machine has its on value of its noise emission quantity. Specifies a procedure for checking compliance of noise values of machines with the labelled values.

• Status: Published
• Publication Date: 31-Mar-1997
• ICS: 17.140.20 - Noise emitted by machines and equipment
• Technical Committee: AKU - Acoustics
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Apr-1997
• Due Date: 01-Apr-1997
• Completion Date: 01-Apr-1997
• Ref Project: EN 27574-2:1988 - Acoustics - Statistical methods for determining and verifying stated noise emission values of machinery and equipment - Part 2: Methods for stated values for individual machines (ISO 7574-2:1985)

• Referred By: SIST-TS CLC/TS 61400-14:2017 - Wind turbines - Part 14: Declaration of apparent sound power level and tonality values (IEC/TS 61400-14:2005)
• Effective Date: 09-Feb-2026

SIST EN 27574-2:1997 is a Slovenian standard from SIST in the acoustics series. It gives statistical guidance for stating noise emission values for individually-labelled machinery and equipment, and for checking whether a single machine meets its declared noise value. In practice, it is for people who need a defensible way to label, measure, and verify noise for one machine at a time.

What does SIST EN 27574-2:1997 specify?

SIST EN 27574-2:1997 specifies methods for determining the labelled noise emission values of individual machines and a procedure for verifying compliance of one machine or item of equipment with its labelled value. The focus is on the case where each produced machine has its own declared noise value.

The document is organized as an introduction, scope and field of application, references, definitions, and a general section. The introduction points readers to the broader series in ISO 7574 and explains how “labelled value” is used in this part.

What are the key requirements of SIST EN 27574-2:1997?

• Clause 1 limits the scope to individually-labelled machines and equipment. Each machine has its own labelled noise emission value. In practice, this part is used when you are not dealing with a batch-wide declaration.

• Clause 1 also gives a verification method for a single machine. It specifies how to check whether the noise emission of one machine complies with its labelled value. In practice, the result is a comparison against the declared limit for that unit.

• Clause 1 excludes the consequences of a non-confirmed stated value. The standard tells you how to verify, but not what follow-up action to take if the machine does not confirm the stated value. In practice, you need another procedure for rejection, retest, or corrective action.

• Clause 2 links this part to sound power measurement standards. It cites ISO 3741, ISO 3742, ISO 3743, ISO 3744, ISO 3745 and ISO 3746, plus ISO 4871 and the other parts of ISO 7574. In practice, you use those documents to choose the measurement method and the wider noise-labelling framework.

• Clause 3 adopts the definitions from ISO 7574/1. The terms used here are not redefined in full. In practice, you need the general part of the series to interpret the vocabulary consistently.

• Clause 4 sets the basic compliance principle. The labelled value is treated as the limit below which the machine’s noise emission value should lie. In practice, verification is based on the declared limit rather than on a broader population estimate.

• Clause 4 says the statistical use is limited. Statistics matter mainly when estimating K, and the method is not presented as a general statistical analysis. In practice, this keeps the method focused on verification rather than on full-scale statistical modelling.

• Clause 4 assumes qualified testing. Measurements are expected to be carried out by a testing laboratory with suitable facilities and trained staff. In practice, the method is intended for controlled measurement conditions.

What terms does SIST EN 27574-2:1997 define?

• Labelled value - a stated noise value, such as a label value, an authority-set upper noise limit, or an agreed contract value.
• Noise emission value - the acoustic value assigned to a machine for stating or checking its emitted noise.
• Individually-labelled machinery and equipment - machinery and equipment where each produced machine has its own labelled noise emission value.
• Testing laboratory - the laboratory assumed to perform the measurements with appropriate facilities and trained staff.
• Compliance - the condition where an individual machine’s noise emission is checked against, and lies within, its labelled value.
• Statistical methods - the limited statistical tools used here mainly for verification and for estimating K.

Who uses SIST EN 27574-2:1997?

SIST EN 27574-2:1997 is used by machinery manufacturers, acoustic test laboratories, quality managers, and buyers or specifiers who need declared noise values for single machines. It is also relevant to authorities or contract parties that set or check an upper noise limit for an individual item. The practical task is to label, test, and verify one machine at a time.

What changed in SIST EN 27574-2:1997 from the previous edition?

SIST EN 27574-2:1997 is identical to EN 27574-2:1988.

Which standards are used with SIST EN 27574-2:1997?

• ISO 3741 - precision sound power determination for broad-band sources in reverberation rooms.
• ISO 3742 - precision sound power determination for discrete-frequency and narrow-band sources in reverberation rooms.
• ISO 3743 - engineering sound power determination in special reverberation test rooms.
• ISO 3744 - engineering sound power determination in free-field conditions over a reflecting plane.
• ISO 3745 - precision sound power determination in anechoic and semi-anechoic rooms.
• ISO 3746 - survey method for sound power levels.
• ISO 4871 - the noise-labelling standard for machinery and equipment.
• ISO 7574/1 - the general considerations and definitions for the series.
• ISO 7574/4 - the part for stated values for batches of machines.

What does the SIST EN 27574-2:1997 document contain?

The document contains a short technical framework rather than a long test procedure. It sets out the scope, names the measurement standards it relies on, adopts the series definitions, and states the principle used to verify an individual machine against its labelled noise value. The general section explains that the labelled value is treated as a limit and that the statistical element is narrow in scope, mainly around estimating K.

SLOVENSKI STANDARD
01-april-1997
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Acoustics - Statistical methods for determining and verifying stated noise emission
values of machinery and equipment - Part 2: Methods for stated values for individual
machines (ISO 7574-2:1985)
Akustik - Statistische Verfahren zur Festlegung und Nachprüfung angegebener (oder
vorgegebener) Geräuschemissionswerte von Maschinen und Geräten - Teil 2: Verfahren
für Angaben (oder Vorgaben) für Einzelmaschinen (ISO 7574-2:1985)
Acoustique - Méthodes statistiques pour la détermination et le contrôle des valeurs
déclarées d'émission acoustique des machines et équipements - Partie 2: Méthodes
pour valeurs déclarées de machines individuelles (ISO 7574-2:1985)
Ta slovenski standard je istoveten z: EN 27574-2:1988
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEM~YHAPOAHAR OPfAHM3AL&lR fl0 CTAH~APTbl3Al&lM.ORGANISATlON INTERNATIONALE DE NORMALlSATlON
Acoustics - Statistical methods for determining and
verifying stated noise emission values of machinery and
equipment -
Part 2 : Methods for stated values for individual machines
M&hodes statistiques pour Ia dhtermination et Ie contr6le des valeurs d&lartGes d%mission acoustique des
Acoustique -
Partie 2 : M&hodes pour valeurs d&clar&es de machines individuelles
machines et t!quipements -
First edition - 1985-12-15
Ref. No. ISO 7574/2-1985 (E)
UDC 534.835.46 : 512.24
noise (Sound), statistical quality control, statistical analysis.
Descriptors : acoustics, machiner,y,
Price based on 2 pages
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards bodies (ISO member bodies). The work of preparing International
Standards is normally carried out through ISO technical committees. Esch member
body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take patt in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council. They are approved in accordance with ISO procedures requiring at
least 75 % approval by the member bodies voting.
International Standard ISO 7574/2 was prepared by Technical Committee ISO/TC 43,
Acoustics.
Users should note that all International Standards undergo revision from time to time
and that any reference made herein to any other International Standard implies its
latest edition, unless othetwise stated.
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