SIST EN ISO 11200:2009
(Main)Acoustics - Noise emitted by machinery and equipment - Guidelines for the use of basic standards for the determination of emission sound pressure levels at a work station and at other specified positions (ISO 11200:1995, including Cor 1:1997)
Acoustics - Noise emitted by machinery and equipment - Guidelines for the use of basic standards for the determination of emission sound pressure levels at a work station and at other specified positions (ISO 11200:1995, including Cor 1:1997)
Provides brief summaries of the basic Standards for determining emission sound pressure levels from all-types of machinery and equipment, at work stations and other specified positions, and gives guidance on the process of selection of which is appropriate to any particular type. The guidance given applies only to airborne sound, and is for use in the preparation of noise test codes, and also for use in noise testing where no noise test code exists. It is important that specific noise test codes for various types of machinery and equipment be established and used in accordance with the requirements of these basic standards. Such standardized noise test codes will give detailed requirements on mounting and operating conditions for the particular family to which the machine under test belongs, as well as the location of the work station(s) and other specified positions as prescribed in these standards. The data so obtained may also be used for the declaration and verification of emission sound pressure levels as specified in ISO 4871.
Akustik - Geräuschabstrahlung von Maschinen und Geräten - Leitlinien zur Anwendung der Grundnormen zur Bestimmung von Emissions-Schalldruckpegeln am Arbeitsplatz und an anderen festgelegten Orten (ISO 11200:1995, einschließlich Cor 1:1997)
Acoustique - Bruit émis par les machines et équipements - Guide d'utilisation des normes de base pour la détermination des niveaux de pression acoustique d'émission au poste de travail et en d'autres positions spécifiées (ISO 11200:1995, Cor 1:1997 inclus)
La présente Norme internationale donne un résumé succinct des Normes internationales de base qui permettent de déterminer les niveaux de pression acoustique d'émission de tous types de machines et d'équipements, au poste de travail et en d'autres positions spécifiées. Elle constitue également un guide pour le choix de la norme appropriée à un type de machine ou d'équipement donné. Ces recommandations s'appliquent uniquement au bruit aérien et doivent être utilisées d'une part, lors de la préparation des codes d'essai acoustiques et d'autre part, lors des essais acoustiques en l'absence de code d'essai acoustique. Il est important que des codes d'essai acoustiques spécifiques à divers types de machines et d'équipements soient établis et utilisés conformément aux prescriptions de ces Normes internationales de base. Ces codes d'essai acoustiques normalisés donnent des prescriptions détaillées relatives aux conditions de montage et de fonctionnement de la famille à laquelle la machine en essai appartient, ainsi qu'à l'emplacement du (des) poste(s) de travail et des autres positions spécifiées prescrites dans ces Normes internationales. Les données ainsi obtenues peuvent également être utilisées pour la déclaration et la vérification des niveaux de pression acoustique d'émission, comme prescrit dans l'ISO 4871.
NOTE 1 Pour une machine particulièr 715e, les niveaux de pression acoustique d'émission en toute position et dans des conditions de montage et de fonctionnement données, déterminés selon l'une des méthodes prescrites dans l'ISO 11201 à l'ISO 11204, seront en général inférieurs aux niveaux de pression acoustique mesurés sur la même machine dans la salle où elle est utilisée. Cela est dû à la réverbération et à la présence d'autres machines. Une méthode de calcul des niveaux de pression acoustique au voisinage d'une machine fonctionnant seule dans une salle est donnée dans l'ISO 11690-3. Les différences normalement observées sont de l'ordre de 1 dB à 5 dB,
Akustika - Emisija hrupa naprav in opreme - Smernice za uporabo temeljnih standardov za ugotovljanje emisijske ravni zvočnega tlaka na mestu delovanja in na drugih opredeljenih mestih (ISO 11200:1995, vključno s popravkom Cor 1:1997)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 11200:2009
01-november-2009
1DGRPHãþD
SIST EN ISO 11200:1997
SIST EN ISO 11200:1997/AC:1999
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VWDQGDUGRY]DXJRWRYOMDQMHHPLVLMVNHUDYQL]YRþQHJDWODNDQDPHVWXGHORYDQMDLQ
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Acoustics - Noise emitted by machinery and equipment - Guidelines for the use of basic
standards for the determination of emission sound pressure levels at a work station and
at other specified positions (ISO 11200:1995, including Cor 1:1997)
Akustik - Geräuschabstrahlung von Maschinen und Geräten - Leitlinien zur Anwendung
der Grundnormen zur Bestimmung von Emissions-Schalldruckpegeln am Arbeitsplatz
und an anderen festgelegten Orten (ISO 11200:1995, einschließlich Cor 1:1997)
Acoustique - Bruit émis par les machines et équipements - Guide d'utilisation des
normes de base pour la détermination des niveaux de pression acoustique d'émission au
poste de travail et en d'autres positions spécifiées (ISO 11200:1995, Cor 1:1997 inclus)
Ta slovenski standard je istoveten z: EN ISO 11200:2009
ICS:
17.140.20 Emisija hrupa naprav in Noise emitted by machines
opreme and equipment
SIST EN ISO 11200:2009 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 11200:2009
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SIST EN ISO 11200:2009
EUROPEAN STANDARD
EN ISO 11200
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2009
ICS 17.140.20 Supersedes EN ISO 11200:1995
English Version
Acoustics - Noise emitted by machinery and equipment -
Guidelines for the use of basic standards for the determination
of emission sound pressure levels at a work station and at other
specified positions (ISO 11200:1995, including Cor 1:1997)
Acoustique - Bruit émis par les machines et équipements - Akustik - Geräuschabstrahlung von Maschinen und
Guide d'utilisation des normes de base pour la Geräten - Leitlinien zur Anwendung der Grundnormen zur
détermination des niveaux de pression acoustique Bestimmung von Emissions-Schalldruckpegeln am
d'émission au poste de travail et en d'autres positions Arbeitsplatz und an anderen festgelegten Orten (ISO
spécifiées (ISO 11200:1995, Cor 1:1997 inclus) 11200:1995, einschließlich Cor 1:1997)
This European Standard was approved by CEN on 27 July 2009.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11200:2009: E
worldwide for CEN national Members.
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SIST EN ISO 11200:2009
EN ISO 11200:2009 (E)
Contents Page
Foreword .3
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC .4
Annex ZB (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC .5
2
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SIST EN ISO 11200:2009
EN ISO 11200:2009 (E)
Foreword
The text of ISO 11200:1995, including Cor 1:1997 has been prepared by Technical Committee ISO/TC 43
“Acoustics” of the International Organization for Standardization (ISO) and has been taken over as EN ISO
11200:2009 by Technical Committee CEN/TC 211 “Acoustics” the secretariat of which is held by DS.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by February 2010, and conflicting national standards shall be withdrawn
at the latest by February 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 11200:1995.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EC Directives.
For relationship with EC Directives, see informative Annexes ZA and ZB, which are integral parts of this
document.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 11200:1995, including Cor 1:1997 has been approved by CEN as a EN ISO 11200:2009
without any modification.
3
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SIST EN ISO 11200:2009
EN ISO 11200:2009 (E)
Annex ZA
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 98/37/EC
This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide a means of conforming to Essential Requirements of the
New Approach Directive 98/37/EC, amended by 98/79/EC on machinery.
Once this standard is cited in the Official Journal of the European Union under that Directive and has been
implemented as a national standard in at least one Member State, compliance with the normative clauses of
this standard confers, within the limits of the scope of this standard, a presumption of conformity with the
relevant Essential Requirements of that Directive and associated EFTA regulations.
WARNING - Other requirements and other EU Directives may be applicable to the product(s) falling within the
scope of this standard.
4
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SIST EN ISO 11200:2009
EN ISO 11200:2009 (E)
Annex ZB
(informative)
Relationship between this European Standard and the Essential
Requirements of EU Directive 2006/42/EC
This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide a means of conforming to Essential Requirements of the
New Approach Directive 2006/42/EC on machinery.
Once this standard is cited in the Official Journal of the European Union under that Directive and has been
implemented as a national standard in at least one Member State, compliance with the normative clauses of
this standard confers, within the limits of the scope of this standard, a presumption of conformity with the
relevant Essential Requirements of that Directive and associated EFTA regulations.
WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling within
the scope of this standard.
5
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SIST EN ISO 11200:2009
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SIST EN ISO 11200:2009
INTERNATIONAL IS0
STANDARD 11200
First edition
1995-l 2-15
Acoustics - Noise emitted by machinery
and equipment
- Guidelines for the use
of basic standards for the determination of
emission sound pressure levels at a work
station and at other specified positions
Acoustique - Bruit 6mis par /es machines et Quipements - Guide
d’utilisation des normes de base pour la determination des niveaux de
pression acoustique d’6mission au poste de travail et en d’autres positions
sp&if@es
Reference number
IS0 11 ZOO:1 995(E)
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SIST EN ISO 11200:2009
IS0 11200:1995(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
technical committees. Each 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, governmental
and non-governmental, in liaison with ISO, also take part in the work. IS0
collaborates closely with the International Electrotechnical Commission
(I EC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 11200 was prepared by Technical Committee
ISO/TC 43, Acoustics, Subcommittee SC 1, Noise.
Annex A forms an integral part of this Inter national Standard. Annex B is
for information only.
0 IS0 1995
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
ii
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SIST EN ISO 11200:2009
0 IS0 IS0 11200:1995(E)
Introduction
0.1 Control of noise from machinery or equipment requires effective
exchange of acoustical information among the several parties concerned.
These include the manufacturer, installer and user of the machinery or
equipment. This acoustical information is obtained from measurements.
These measurements are useful only if the conditions under which they
are carried out are specified, if they yield defined acoustical quantities, and
if they are made using standardized instruments.
Two quantities which complement one another can be used to describe
the sound emission of machinery or equipment. One of them is the sound
power level and the other is the emission sound pressure level at a
specified position. The International Standards which describe the basic
methods of determining the sound power level are IS0 3740 to IS0 3747
and IS0 9614-I and IS0 9614-2. This International Standard introduces a
series of four International Standards describing various methods for de-
termining emission sound pressure levels of machinery and equipment.
Emission sound pressure levels are sound pressure levels at one or more
positions located in the vicinity of an item of machinery or equipment,
which arise solely from the noise emitted by that machinery or equipment
when it performs a specified function under given operating conditions,
on a particular mounting in a defined acoustic environment. The operating
and mounting conditions are the same as those used in the determination
of sound power levels. The positions with which this series of International
Standards is concerned include work stations, normally specified in a noise
test code (if one exists), occupied by one or more operators of the ma-
chinery, and other positions which may be occupied from time to time by
other persons. The positions may be located in the vicinity of the ma-
chinery, or in a cab, or in some other enclosure more or less remote from
the machinery. Emission sound pressure levels may arise from contin-
uous, steady operational machinery or they may be averages for a defined
work cycle; they are not averages over a total working day during which
the machinery might perform different functions, operate at different
control settings, or undergo changes of work load.
Emission sound pressure levels in conjunction with sound power levels
are used for declaration of the noise emitted under the defined conditions,
verification of declared values, comparison of the noise emitted by ma-
chinery of various types and sizes, comparison with limits specified in a
purchasing contract or a regulation, engineering work to reduce the noise
emission of machinery, and prediction of noise exposure at the specified
positions.
For many products, the sound power level is the primary metric for com-
parison of noise emissions. Noise test codes and specific declaration
codes should state the primary metric for comparison.
. . .
Ill
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SIST EN ISO 11200:2009
0 IS0
IS0 11200:1995(E)
It is not the intent of this series of International Standards to describe
procedures for measuring the occupational noise exposure of workers.
Included in this series of International Standards are three which describe
procedures for measuring emission sound pressure levels directly, in dif-
ferent test environments (IS0 11201, IS0 11202 and IS0 11204), and a
fourth (IS0 11203) which gives procedures for determining emission
sound pressure levels from the sound power level. When applying these
standards to sound measurements on specific machinery, it is necessary
to decide which is the most appropriate for the particular type of machin-
ery or equipment and for the purpose of the test. Guidelines for making
this decision are provided in this International Standard.
0.2 The series of International Standards for which this International
Standard serves as the introduction comprises IS0 11201, IS0 11202,
IS0 11203 and IS0 11204. In principle, the methods of determining
emission sound pressure levels described in IS0 11201 to IS0 11204
cover all types of machinery and equipment. For noise measurements on
a particular kind and size of machinery or equipment, or when there are
certain practical limitations, only one of these International Standards may
be applicable.
IS0 11201 to IS0 II 204 make up a set of basic International Standards
which specify the acoustical conditions and instrumentation to be used,
describe the procedures to be followed, and give general information on
the installation and operation of the machine under test, when determining
emission sound pressure levels. In general, these sound pressure levels
are different from those that would occur if the machinery or equipment
were operating in its normal surroundings, where the environment may
influence the emission sound pressure level. The selection of standards
for the determination of the sound power level can, for practical reasons,
have consequences on the selection of standards for the determination
of the emission sound pressure level. It is preferable to make the choice
of standards concurrently with respect to the two noise emission quan-
tities.
0.3 This International Standard is one of a series which specifies various
methods for determining the noise emissions of a piece of machinery or
equipment, or a sub-assembly of such equipment (machine under test).
Standards in this series are grouped in three categories, as follows.
a) Methods for the determination of emission sound pressure levels
at work stations and at other specified positions
In addition to this International Standard, this category includes the
following standards (see table 1):
- IS0 11201 gives an engineering method for measuring emission
sound pressure levels of machinery and equipment, in an essen-
tially free field over a reflecting plane, with no environmental cor-
rection;
- IS0 11202 gives a survey method for measuring emission sound
pressure levels of machinery and equipment in situ with an en-
vironmental correction using a simplified method;
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SIST EN ISO 11200:2009
0 IS0 IS0 11200:1995(E)
- IS0 11203 gives two alternative methods for determining the
emission sound pressure levels of machinery and equipment from
the sound power levels;
- IS0 11204 gives a method for measuring the emission sound
pressure levels of machinery and equipment yielding engineering
grade or survey grade results.
Methods for the determination of sound power levels
b)
- IS0 3740 gives guidelines for the choice of the method to be used
for determining the sound power emitted by machinery and
equipment;
- IS0 3741 to IS0 3747 give methods for determining the sound
power levels of machinery and equipment via sound pressure
measurements;
- parts 1 and 2 of IS0 9614 describe methods for determining the
sound power levels of machinery and equipment via sound inten-
sity measurements.
c) Noise tests codes
For a particular family of machinery or equipment, noise test codes
specify:
- the meth od to be used for the determination of the sound p ower
- the method to be used for the determination of emission sound
pressure levels at work stations, and at other specified positions;
- the positions of the work stations;
- the mounting and operating conditions of the machine under test
for the purpose of determining the noise emission quantities;
- the method to be used for verifying declared noise emission
quantities.
V
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SIST EN ISO 11200:2009
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SIST EN ISO 11200:2009
IS0 11200:1995(E)
INTERNATIONAL STANDARD 0 IS0
Acoustics - Noise emitted by machinery and
- Guidelines for the use of basic standards
equipment
for the determination of emission sound pressure
levels at a work station and at other specified positions
2 Normative references
1 Scope
This International Standard provides brief summaries
of the basic International Standards for determining
The following standards contain provisions which,
emission sound pressure levels from all types of ma-
through reference in this text, constitute provisions
chinery and equipment, at work stations and at other
of this International Standard. At the time of publi-
specified positions, and gives guidance on the pro-
cation, the editions indicated were valid. All standards
cess of selection of which is appropriate to any par-
are subject to revision, and parties to agreements
ticular type. The guidance given applies only to
based on this International Standard are encouraged
airborne sound, and is for use in the preparation of
to investigate the possibility of applying the most re-
noise test codes, and also for use in noise testing
cent editions of the standards indicated below.
where no noise test code exists.
Members of IEC and IS0 maintain registers of cur-
rently valid International Standards.
It is important that specific noise test codes for vari-
ous types of machinery and equipment be established
IS0 2204:1979, Acoustics - Guide to International
and used in accordance with the requirements of
Standards on the measurement of airborne acoustical
these basic International Standards. Such standard- noise and evaluation of its effects on human beings.
ized noise test codes will give detailed requirements
on mounting and operating conditions for the particu- IS0 3740: 1980, Acoustics - Determination of sound
lar family to which the machine under test belongs, power levels of noise sources - Guidelines for the
as well as the location of the work station(s) and other use of basic standards and for the preparation of noise
specified positions as prescribed in these International test codes.
Standards. The data so obtained may also be used for
IS0 3741 :I 988, Acoustics - Determination of sound
the declaration and verification of emission sound
power levels of noise sources - Precision methods
pressure levels as specified in IS0 4871.
for broad-band sources in reverberation rooms.
NOTE 1 At any given position in relation to a particular
machine, and for given mounting and operating conditions, IS0 3742:1988, Acoustics
- Determination of sound
the emission sound pressure levels determined by any of
power levels of noise sources - Precision methods
the methods given in IS0 11201 to IS0 11204 will in gen-
for discrete-frequency and narrow-band sources in
eral be lower than the directly measured sound pressure
reverberation rooms.
levels for the same machine in the typical workroom where
it is used. This is due to reverberation and the contributions
IS0 3743-l :I 994, Acoustics - Determination of
of other machines. A method of calculating the sound
sound power levels of noise sources - Engineering
pressure levels in the vicinity of a machine operating alone
methods for small, movable sources in reverberant
in a workroom is given in IS0 11690-3. Commonly observed
fields - Part I: Comparison method for hard-walled
differences are 1 dB to 5 dB, but in extreme cases the dif-
test rooms.
ference may be even greater.
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SIST EN ISO 11200:2009
0 IS0
IS0 11200:1995(E)
IS0 3743-2:1994, Acoustics - Determination of IS0 12001 :I 995, Acoustics - Noise emitted by ma-
chinery and equipment - Rules for the drafting and
sound power levels of noise sources using sound
presentation of a noise test code.
pressure - Engineering methods for small, movable
sources in reverberant fields - Part 2: Methods for
IEC 651: 1979, Sound level meters.
special reverberation test rooms.
I EC 804: 1985, Integrating-averaging sound level
IS0 3744: 1994, Acoustics - Determination of sound
meters.
power levels of noise sources using sound pressure
- Engineering method in an essentially free field over
I EC 942: 1988, Sound calibrators.
a reflecting plane.
IEC 1260: -*), Electroacoustics - Octave-band and
IS0 3745: 1977, Acoustics - Determination of sound
fractional-octave-band filters.
power levels of noise sources - Precision methods
for anechoic and semi-anechoic rooms.
of sound
IS0 3746:1995, Acoustics - Determination
3 Definitions
pressure
power levels of noise sources using sound
- Survey method using an enveloping measurement
For the purposes of this International Standard, the
surface over a reflecting plane.
following definitions apply. More detailed definitions
- Determination of sound may be found in noise test codes for specific types
IS0 3747: 1987, Acoustics
of machinery and equipment.
power levels of noise sources - Survey method us-
ing a reference sound source.
3.1 emission: Airborne sound radiated by a well-
IS0 9614-I :I 993, Acoustics - Determination of
defined noise source (e.g. the machine under test).
sound power levels of noise sources using sound in-
tensity - Part I: Measurement at discrete points.
NOTE 2 Noise emission descriptors may be incorporated
in a product label and/or product specification. The basic
noise emission descriptors are the sound power level of the
IS0 9614-2: -‘I, Acoustics - Determination of sound
source itself and the emission sound pressure levels at a
power levels of noise sources using sound intensity
work station and/or at other specified positions (if any) in the
- Part 2: Measurement by scanning.
vicinity of the source.
IS0 11201 :I 995, Acoustics - Noise emitted by ma-
3.2 emission sound pressure, p: The sound press-
chinery and equipment - Measurement of emission
ure, at a specified position near a noise source, when
sound pressure levels at a work station and at other
the source is in operation under specified operating
specified positions - Engineering method in an es-
and mounting conditions on a reflecting plane surface,
sentially free field over a reflecting plane.
excluding the effects of background noise as well as
the effects of reflections other than those from the
IS0 11202:1995, Acoustics - Noise emitted by ma-
chinery and equipment - Measurement of emission plane or planes permitted for the purpose of the test.
sound pressure levels at a work station and at other It is expressed in pascals.
specified positions - Survey method in situ.
3.3 emission sound pressure level, Lp: Ten times
IS0 11203:1995, Acoustics - Noise emitted by ma-
the logarithm to the base IO of the ratio of the square
chinery and equipment - Determination of emission
of the emission sound pressure, p* t), to the square
1
sound pressure levels at a work station and at other
of the reference sound pressure, po, measured with
specified positions from the sound power level.
a particular time weighting and a particular frequency
weighting, selected from those defined in IEC 651. It
IS0 11204:1995, Acoustics - Noise emitted by ma-
is expressed in decibels. The reference sound press-
- Measurement of emission
chinery and equipment
ure is 20 PPa.
sound pressure levels at a work station and at other
specified positions - Method requiring environ-
NOTE 3 Examples include:
mental corrections.
- maximum A-weighted emission sound pressure level
with time-weighting F: LPAFmax;
1) To be published. -
2) To be published. (Revision of IEC 225:1966)
2
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SIST EN ISO 11200:2009
0 IS0 IS0 11200:1995(E)
- C-weighted peak emission sound pressure level: a controlled a co environment are used for the
L measurements.
&peak-
3.7 work station; operator’s position: Position in
The emission sound pressure level shall be deter-
the vicinity of the machine under test which is in-
mined at a specified position in accordance with either
tended for the operator.
a test code for a specific family of machines or, if no
test code exists, a method that complies with the
3.8 operator: Individual whose work station is in the
IS0 11200 series.
vicinity of a machine and who is performing a work
task associated with that machine.
3.4 sound power, ‘ur: The rate per unit time at
which airborne sound energy is radiated by a source.
3.9 specified position: Position defined in relation
It is expressed in watts.
to a machine, including, but not limited to, an oper-
ator’s position. The position can be a single, fixed
point, or a combination of points along a path or on a
3.5 sound power llevel, &,: Ten times the logarithm
surface located at a specified distance from the ma-
to the base IO of the ratio of the sound power radi-
chine, as described in the relevant noise test code, if
ated by the source under test to the reference sound
any exists.
power. It is expressed in decibels.
NOTE 7 Positions located in the vicinity of a work station,
The frequency weighting or the width of the fre-
or in the vicinity of an unattended machine, may be ident-
quency band used shall be indicated. The reference
ified as “bystander positions”.
power is 1 pW (I pW = 1 O-l* W).
3.10 background noise: The noise from all sources
NOTE 4 For example, the A-weighted sound power level
other than the machine under test.
is i&*.
NOTE 8 Background noise may include contributions
3.6 time-averaged emission sound pressure
from airborne sound, structure-borne vibration, and elec-
level, LpeqT: Emission sound pressure level of a con-
trical noise in instrumentation.
tinuous steady sound that, within a measurement
time internal, T, has the same mean square sound 3.11 background noise level: The sound pressure
pressure as a sound under consideration which varies level measured when the machine under test is not
with time. It is expressed in decibels. operating. It is expressed in decibels.
It is given by the following equation:
3.12 background noise correction, KI: A correction
term to account for the influence of background noise
T P*(t)
1 on the emission sound pressure level at the specified
L dt dB . . .
(1)
peqT = 1 O lg
7 2
I
positions of the machine under test. K, is frequency
O PO
dependent and is expressed in decibels. The cor-
rection in the case of A-weighting, I&, is to be de-
A-weighted time-averaged emission sound pressure
termined from A-weighted measured values.
levels are denoted by LpAeqT, which is usually abbrevi-
ated 10 LpA. $AeqT shall be measured with an instru-
3.13 environmental indicator, K2: A term to ac-
ment which complies with the requirements of
count for the influence of reflected or absorbed sound
IEC 804.
on the surface sound pressure level; K2 is frequency
dependent and is expressed in decibels. In the case
NOTES
of A-weighting, it is denoted K2A (see the IS0 3740
5 In general, the subscripts eq and T are omitted since
series).
time-averaged emission sound pressure levels are necess-
arily determined over a certain measurement time interval.
3.14 local environmental correction, KS: A cor-
rection term to account for the i
...
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.HPHOMQLKAkustik - Geräuschabstrahlung von Maschinen und Geräten - Leitlinien zur Anwendung der Grundnormen zur Bestimmung von Emissions-Schalldruckpegeln am Arbeitsplatz und an anderen festgelegten Orten (ISO 11200:1995, einschließlich Cor 1:1997)Acoustique - Bruit émis par les machines et équipements - Guide d'utilisation des normes de base pour la détermination des niveaux de pression acoustique d'émission au poste de travail et en d'autres positions spécifiées (ISO 11200:1995, Cor 1:1997 inclus)Acoustics - Noise emitted by machinery and equipment - Guidelines for the use of basic standards for the determination of emission sound pressure levels at a work station and at other specified positions (ISO 11200:1995, including Cor 1:1997)17.140.20Emisija hrupa naprav in opremeNoise emitted by machines and equipmentICS:Ta slovenski standard je istoveten z:FprEN ISO 11200kSIST FprEN ISO 11200:2009en01-junij-2009kSIST FprEN ISO 11200:2009SLOVENSKI
STANDARD
kSIST FprEN ISO 11200:2009
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMFINAL DRAFTFprEN ISO 11200March 2009ICS 17.140.20Will supersede EN ISO 11200:1995
English VersionAcoustics - Noise emitted by machinery and equipment -Guidelines for the use of basic standards for the determinationof emission sound pressure levels at a work station and at otherspecified positions (ISO 11200:1995, including Cor 1:1997)Acoustique - Bruit émis par les machines et équipements -Guide d'utilisation des normes de base pour ladétermination des niveaux de pression acoustiqued'émission au poste de travail et en d'autres positionsspécifiées (ISO 11200:1995, Cor 1:1997 inclus)Akustik - Geräuschabstrahlung von Maschinen undGeräten - Leitlinien zur Anwendung der Grundnormen zurBestimmung von Emissions-Schalldruckpegeln amArbeitsplatz und an anderen festgelegten Orten (ISO11200:1995, einschließlich Cor 1:1997)This draft European Standard is submitted to CEN members for unique acceptance procedure. It has been drawn up by the TechnicalCommittee CEN/TC 211.If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations whichstipulate the conditions for giving this European Standard the status of a national standard without any alteration.This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other languagemade by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has thesame status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice andshall not be referred to as a European Standard.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre:
Avenue Marnix 17,
B-1000 Brussels© 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. FprEN ISO 11200:2009: EkSIST FprEN ISO 11200:2009
FprEN ISO 11200:2009 (E) 2 Contents Page Foreword .3Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC .4Annex ZB (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC .5 kSIST FprEN ISO 11200:2009
FprEN ISO 11200:2009 (E) 3 Foreword The text of ISO 11200:1995, including Cor 1:1997 has been prepared by Technical Committee ISO/TC 43 “Acoustics” of the International Organization for Standardization (ISO) and has been taken over as FprEN ISO 11200:2009 by Technical Committee CEN/TC 211 “Acoustics” the secretariat of which is held by DS. This document is currently submitted to the Unique Acceptance Procedure. This document will supersede EN ISO 11200:1995. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EC Directives. For relationship with EC Directives, see informative Annexes ZA and ZB, which are integral parts of this document. Endorsement notice The text of ISO 11200:1995, including Cor 1:1997 has been approved by CEN as a FprEN ISO 11200:2009 without any modification. kSIST FprEN ISO 11200:2009
FprEN ISO 11200:2009 (E) 4
Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 98/37/EC This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association to provide a means of conforming to Essential Requirements of the New Approach Directive 98/37/EC, amended by 98/79/EC on machinery. Once this standard is cited in the Official Journal of the European Communities under that Directive and has been implemented as a national standard in at least one Member State, compliance with the normative clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity with the relevant Essential Requirements of that Directive and associated EFTA regulations. WARNING - Other requirements and other EU Directives may be applicable to the product(s) falling within the scope of this standard. kSIST FprEN ISO 11200:2009
FprEN ISO 11200:2009 (E) 5 Annex ZB (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association to provide a means of conforming to Essential Requirements of the New Approach Directive 2006/42/EC on machinery. Once this standard is cited in the Official Journal of the European Communities under that Directive and has been implemented as a national standard in at least one Member State, compliance with the normative clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity with the relevant Essential Requirements of that Directive and associated EFTA regulations. WARNING — Other requirements and other EU Directives may be applicable to the product(s) falling within the scope of this standard.
kSIST FprEN ISO 11200:2009
kSIST FprEN ISO 11200:2009
INTERNATIONAL STANDARD IS0 11200 First edition 1995-l 2-15 Acoustics - Noise emitted by machinery and equipment - Guidelines for the use of basic standards for the determination of emission sound pressure levels at a work station and at other specified positions Acoustique - Bruit 6mis par /es machines et Quipements - Guide d’utilisation des normes de base pour la determination des niveaux de pression acoustique d’6mission au poste de travail et en d’autres positions sp&if@es Reference number IS0 11 ZOO:1 995(E) kSIST FprEN ISO 11200:2009
IS0 11200:1995(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each 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, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (I EC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 11200 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise. Annex A forms an integral part of this Inter for information only. national Standard. Annex B is 0 IS0 1995 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case Postale 56 l CH-1211 Geneve 20 l Switzerland Printed in Switzerland ii kSIST FprEN ISO 11200:2009
0 IS0 IS0 11200:1995(E) Introduction 0.1 Control of noise from machinery or equipment requires effective exchange of acoustical information among the several parties concerned. These include the manufacturer, installer and user of the machinery or equipment. This acoustical information is obtained from measurements. These measurements are useful only if the conditions under which they are carried out are specified, if they yield defined acoustical quantities, and if they are made using standardized instruments. Two quantities which complement one another can be used to describe the sound emission of machinery or equipment. One of them is the sound power level and the other is the emission sound pressure level at a specified position. The International Standards which describe the basic methods of determining the sound power level are IS0 3740 to IS0 3747 and IS0 9614-I and IS0 9614-2. This International Standard introduces a series of four International Standards describing various methods for de- termining emission sound pressure levels of machinery and equipment. Emission sound pressure levels are sound pressure levels at one or more positions located in the vicinity of an item of machinery or equipment, which arise solely from the noise emitted by that machinery or equipment when it performs a specified function under given operating conditions, on a particular mounting in a defined acoustic environment. The operating and mounting conditions are the same as those used in the determination of sound power levels. The positions with which this series of International Standards is concerned include work stations, normally specified in a noise test code (if one exists), occupied by one or more operators of the ma- chinery, and other positions which may be occupied from time to time by other persons. The positions may be located in the vicinity of the ma- chinery, or in a cab, or in some other enclosure more or less remote from the machinery. Emission sound pressure levels may arise from contin- uous, steady operational machinery or they may be averages for a defined work cycle; they are not averages over a total working day during which the machinery might perform different functions, operate at different control settings, or undergo changes of work load. Emission sound pressure levels in conjunction with sound power levels are used for declaration of the noise emitted under the defined conditions, verification of declared values, comparison of the noise emitted by ma- chinery of various types and sizes, comparison with limits specified in a purchasing contract or a regulation, engineering work to reduce the noise emission of machinery, and prediction of noise exposure at the specified positions. For many products, the sound power level is the primary metric for com- parison of noise emissions. Noise test codes and specific declaration codes should state the primary metric for comparison. . . . Ill kSIST FprEN ISO 11200:2009
IS0 11200:1995(E) 0 IS0 It is not the intent of this series of International Standards to describe procedures for measuring the occupational noise exposure of workers. Included in this series of International Standards are three which describe procedures for measuring emission sound pressure levels directly, in dif- ferent test environments (IS0 11201, IS0 11202 and IS0 11204), and a fourth (IS0 11203) which gives procedures for determining emission sound pressure levels from the sound power level. When applying these standards to sound measurements on specific machinery, it is necessary to decide which is the most appropriate for the particular type of machin- ery or equipment and for the purpose of the test. Guidelines for making this decision are provided in this International Standard. 0.2 The series of International Standards for which this International Standard serves as the introduction comprises IS0 11201, IS0 11202, IS0 11203 and IS0 11204. In principle, the methods of determining emission sound pressure levels described in IS0 11201 to IS0 11204 cover all types of machinery and equipment. For noise measurements on a particular kind and size of machinery or equipment, or when there are certain practical limitations, only one of these International Standards may be applicable. IS0 11201 to IS0 II 204 make up a set of basic International Standards which specify the acoustical conditions and instrumentation to be used, describe the procedures to be followed, and give general information on the installation and operation of the machine under test, when determining emission sound pressure levels. In general, these sound pressure levels are different from those that would occur if the machinery or equipment were operating in its normal surroundings, where the environment may influence the emission sound pressure level. The selection of standards for the determination of the sound power level can, for practical reasons, have consequences on the selection of standards for the determination of the emission sound pressure level. It is preferable to make the choice of standards concurrently with respect to the two noise emission quan- tities. 0.3 This International Standard is one of a series which specifies various methods for determining the noise emissions of a piece of machinery or equipment, or a sub-assembly of such equipment (machine under test). Standards in this series are grouped in three categories, as follows. a) Methods for the determination of emission sound pressure levels at work stations and at other specified positions In addition to this International Standard, this category following standards (see table 1): includes the - IS0 11201 gives an engineering method for measuring emission sound pressure levels of machinery and equipment, in an essen- tially free field over a reflecting plane, with no environmental cor- rection; - IS0 11202 gives a survey method for measuring emission sound pressure levels of machinery and equipment in situ with an en- vironmental correction using a simplified method; kSIST FprEN ISO 11200:2009
0 IS0 IS0 11200:1995(E) - IS0 11203 gives two alternative methods for determining the emission sound pressure levels of machinery and equipment from the sound power levels; - IS0 11204 gives a method for measuring the emission sound pressure levels of machinery and equipment yielding engineering grade or survey grade results. b) Methods for the determination of sound power levels - IS0 3740 gives guidelines for the choice of the method to be used for determining the sound power emitted by machinery and equipment; - IS0 3741 to IS0 3747 give methods for determining the sound power levels of machinery and equipment via sound pressure measurements; - parts 1 and 2 of IS0 9614 describe methods for determining the sound power levels of machinery and equipment via sound inten- sity measurements. c) Noise tests codes For a particular family of machinery or equipment, noise test codes specify: - the meth od to be used for the determination of the sound p ower - the method to be used for the determination of emission sound pressure levels at work stations, and at other specified positions; - the positions of the work stations; - the mounting and operating conditions of the machine under test for the purpose of determining the noise emission quantities; - the method to be used for verifying declared noise emission quantities. V kSIST FprEN ISO 11200:2009
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INTERNATIONAL STANDARD 0 IS0 IS0 11200:1995(E) Acoustics - Noise emitted by machinery and equipment - Guidelines for the use of basic standards for the determination of emission sound pressure levels at a work station and at other specified positions 1 Scope This International Standard provides brief summaries of the basic International Standards for determining emission sound pressure levels from all types of ma- chinery and equipment, at work stations and at other specified positions, and gives guidance on the pro- cess of selection of which is appropriate to any par- ticular type. The guidance given applies only to airborne sound, and is for use in the preparation of noise test codes, and also for use in noise testing where no noise test code exists. It is important that specific noise test codes for vari- ous types of machinery and equipment be established and used in accordance with the requirements of these basic International Standards. Such standard- ized noise test codes will give detailed requirements on mounting and operating conditions for the particu- lar family to which the machine under test belongs, as well as the location of the work station(s) and other specified positions as prescribed in these International Standards. The data so obtained may also be used for the declaration and verification of emission sound pressure levels as specified in IS0 4871. NOTE 1 At any given position in relation to a particular machine, and for given mounting and operating conditions, the emission sound pressure levels determined by any of the methods given in IS0 11201 to IS0 11204 will in gen- eral be lower than the directly measured sound pressure levels for the same machine in the typical workroom where it is used. This is due to reverberation and the contributions of other machines. A method of calculating the sound pressure levels in the vicinity of a machine operating alone in a workroom is given in IS0 11690-3. Commonly observed differences are 1 dB to 5 dB, but in extreme cases the dif- ference may be even greater. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi- cation, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most re- cent editions of the standards indicated below. Members of IEC and IS0 maintain registers of cur- rently valid International Standards. IS0 2204:1979, Acoustics - Guide to International Standards on the measurement of airborne acoustical noise and evaluation of its effects on human beings. IS0 3740: 1980, Acoustics - Determination of sound power levels of noise sources - Guidelines for the use of basic standards and for the preparation of noise test codes. IS0 3741 :I 988, Acoustics - Determination of sound power levels of noise sources - Precision methods for broad-band sources in reverberation rooms. IS0 3742:1988, Acoustics - Determination of sound power levels of noise sources - Precision methods for discrete-frequency and narrow-band sources in reverberation rooms. IS0 3743-l :I 994, Acoustics - Determination of sound power levels of noise sources - Engineering methods for small, movable sources in reverberant fields - Part I: Comparison method for hard-walled test rooms. kSIST FprEN ISO 11200:2009
IS0 11200:1995(E) 0 IS0 IS0 3743-2:1994, Acoustics - Determination of sound power levels of noise sources using sound pressure - Engineering methods for small, movable sources in reverberant fields - Part 2: Methods for special reverberation test rooms. IS0 3744: 1994, Acoustics - Determination of sound power levels of noise sources using sound - Engineering method in an essentially free a reflecting plane. pressure field over IS0 3745: 1977, Acoustics - Determination power levels of noise sources - Precision for anechoic and semi-anechoic rooms. of sound methods IS0 3746:1995, Acoustics - Determination of sound power levels of noise sources using sound pressure - Survey method using an enveloping measurement surface over a reflecting plane. IS0 3747: 1987, Acoustics - Determination of sound power levels of noise sources - Survey method us- ing a reference sound source. IS0 9614-I :I 993, Acoustics - Determination of sound power levels of noise sources using sound in- tensity - Part I: Measurement at discrete points. IS0 9614-2: -‘I, Acoustics - Determination of sound power levels of noise sources using sound intensity - Part 2: Measurement by scanning. IS0 11201 :I 995, Acoustics - Noise emitted by ma- chinery and equipment - Measurement of emission sound pressure levels at a work station and at other specified positions - Engineering method in an es- sentially free field over a reflecting plane. IS0 11202:1995, Acoustics - Noise emitted by ma- chinery and equipment - Measurement of emission sound pressure levels at a work station and at other specified positions - Survey method in situ. IS0 11203:1995, Acoustics - Noise emitted by ma- chinery and equipment - Determination of emission sound pressure levels at a work station and at other specified positions from the sound power level. IS0 11204:1995, Acoustics - Noise emitted by ma- chinery and equipment - Measurement of emission sound pressure levels at a work station and at other specified positions - Method requiring environ- mental corrections. IS0 12001 :I 995, Acoustics - Noise emitted by ma- chinery and equipment - Rules for the drafting and presentation of a noise test code. IEC 651: 1979, Sound level meters. I EC 804: 1985, Integrating-averaging sound level meters. I EC 942: 1988, Sound calibrators. IEC 1260: -*), Electroacoustics - Octave-band and fractional-octave-band filters. 3 Definitions For the purposes of this International Standard, the following definitions apply. More detailed definitions may be found in noise test codes for specific types of machinery and equipment. 3.1 emission: Airborne sound radiated by a well- defined noise source (e.g. the machine under test). NOTE 2 Noise emission descriptors may be incorporated in a product label and/or product specification. The basic noise emission descriptors are the sound power level of the source itself and the emission sound pressure levels at a work station and/or at other specified positions (if any) in the vicinity of the source. 3.2 emission sound pressure, p: The sound press- ure, at a specified position near a noise source, when the source is in operation under specified operating and mounting conditions on a reflecting plane surface, excluding the effects of background noise as well as the effects of reflections other than those from the plane or planes permitted for the purpose of the test. It is expressed in pascals. 3.3 emission sound pressure level, Lp: Ten times the logarithm to the base IO of the ratio of the square of the emission sound pressure, p* t), 1 to the square of the reference sound pressure, po, measured with a particular time weighting and a particular frequency weighting, selected from those defined in IEC 651. It is expressed in decibels. The reference sound press- ure is 20 PPa. NOTE 3 Examples include: - maximum A-weighted emission sound pressure level with time-weighting F: LPAFmax; 1) To be published. - 2) To be published. (Revision of IEC 225:1966) 2 kSIST FprEN ISO 11200:2009
0 IS0 IS0 11200:1995(E) - C-weighted L &peak- peak emission sound pressure level: The emission sound pressure level shall be deter- mined at a specified position in accordance with either a test code for a specific family of machines or, if no test code exists, a method that complies with the IS0 11200 series. 3.4 sound power, ‘ur: The rate per unit time at which airborne sound energy is radiated by a source. It is expressed in watts. 3.5 sound power llevel, &,: Ten times the logarithm to the base IO of the ratio of the sound power radi- ated by the source under test to the reference sound power. It is expressed in decibels. The frequency weighting or the width of the fre- quency band used shall be indicated. The reference power is 1 pW (I pW = 1 O-l* W). NOTE 4 For example, the A-weighted sound power level is i&*. 3.6 time-averaged emission sound pressure level, LpeqT: Emission sound pressure level of a con- tinuous steady sound that, within a measurement time internal, T, has the same mean square sound pressure as a sound under consideration which varies with time. It is expressed in decibels. It is given by the following equation: L peqT = 1 O lg 1 I T P*(t) 7 2 dt O PO dB . . . (1) A-weighted time-averaged emission sound pressure levels are denoted by LpAeqT, which is usually abbrevi- ated 10 LpA. $AeqT shall be measured with an instru- ment which complies with the requirements of IEC 804. NOTES 5 In general, the subscripts eq and T are omitted since time-averaged emission sound pressure levels are necess- arily determined over a certain measurement time interval. 6 Equation (I) is identical to that for the familiar IS0 en- vironmental noise descriptor “equivalent continuous sound pressure level” defined in IS0 1996-l. However, the emis- sion quantity defined above is used to characterize the noise emitted by a machine under test and assumes that stan- dardized measurement and operating conditions as well as a controlled a measurements. co environment are used for the 3.7 work station; operator’s position: Position in the vicinity of the machine under test which is in- tended for the operator. 3.8 operator: Individual whose work station is in the vicinity of a machine and who is performing a work task associated with that machine. 3.9 specified position: Position defined in relation to a machine, including, but not limited to, an oper- ator’s position. The position can be a single, fixed point, or a combination of points along a path or on a surface located at a specified distance from the ma- chine, as described in the relevant noise test code, if any exists. NOTE 7 Positions located in the vicinity of a work station, or in the vicinity of an unattended machine, may be ident- ified as “bystander positions”. 3.10 background noise: The noise from all sources other than the machine under test. NOTE 8 Background noise may include contributions from airborne sound, structure-borne vibration, and elec- trical noise in instrumentation. 3.11 background noise level: The sound pressure level measured when the machine under test is not operating. It is expressed in decibels. 3.12 background noise correction, KI: A correction term to account for the influence of background noise on the emission sound pressure level at the specified positions of the machine under test. K, is frequency dependent and is expressed in decibels. The cor- rection in the case of A-weighting, I&, is to be de- termined from A-weighted measured values. 3.13 environmental indicator, K2: A term to ac- count for the influence of reflected or absorbed sound on the surface sound pressure level; K2 is frequency dependent and is expressed in decibels. In the case of A-weighting, it is denoted K2A (see the IS0 3740 series). 3.14 local environmental correction, KS: A cor- rection term to account for the influence of reflected sound on the emission sound pressure level at a specified position (e.g. a work station) for the machine under test. K3 is dependent upon both frequency and position and is expressed in decibels. In the case of A-weighting, it is denoted KzA. kSIST FprEN ISO 11200:2009
IS0 11200:1995(E) 0 IS0 4 Selection of the appropriate International Standard for determination of emission sound pressure levels 4.1 General requirements The same installation, mounting and operating con- ditions shall be used for the determination of emission sound pressure levels and sound power levels. The noise test code for the machinery concerned shall describe the installation, mounting and operating conditions in detail. NOTE 9 The noise test code may make an exception to the requirement on identical installation, mounting and op- erating conditions for equipment that is used on tables. Such equipment may be mounted on the floor during sound power determinations. 4.2 Quantities to be measured and determined Methods are specified in IS0 11201 to IS0 11204 for measuring and determining emission sound pressure levels. The levels may be time-averaged, peak, frequency-weighted, frequency-band, or time- weighted, as specified. The preferred frequency weighting is A-weighting, except in the case of peak levels, where C-weighting is preferred. 4.3 Considerations affecting choice of method Factors to be considered when selecting a standard from this series of International Standards include: a) b) d d) the size and transportability of the machinery or equipment, affecting the practicability of setting it up in an acoustical test laboratory for the purpose of the noise measurements; whether or not particular work stations can be identified in relation to the machine; the test environment available for the measure- ments; the grade of accuracy required. NOTE 10 The preferred grade of accuracy for purposes of noise declaration is grade 2 (engineering m ethods). 4.4 Sy
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