EN ISO 11690-2:1996
(Main)Acoustics - Recommended practice for the design of low-noise workplaces containing machinery - Part 2: Noise control measures (ISO 11690-2:1996)
Acoustics - Recommended practice for the design of low-noise workplaces containing machinery - Part 2: Noise control measures (ISO 11690-2:1996)
Migrated from Progress Sheet (TC Comment) (2000-07-10): BTS4 by RES BTS4 C1/1992 approved new target dates as requested by CEN/TC 211 ++ for the launching of the parallel voting procedure.
Akustik - Richtlinien für die Gestaltung lärmarmer maschinenbestückter Arbeitsstätten - Teil 2: Lärmminderungsmaßnahmen (ISO 11690-2:1996)
Dieser Teil von ISO 11690 befasst sich mit technischen Gesichtspunkten der Lärmminderung in Arbeitsstätten. Es werden die verschiedenen technischen Massnahmen angegeben, die entsprechenden akustischen Grössen beschrieben, das Ausmass der Lärmminderung diskutiert und die Nachprüfverfahren grob beschrieben. Dieser Teil von ISO 11960 befasst sich ausschliesslich mit Hörschall. Anmerkung 1: Anhang K enthält eine Auflistung von internationalen Normen und anderer Literatur zur Lärmminderung.
Acoustique - Pratique recommandée pour la conception de lieux de travail à bruit réduit contenant des machines - Partie 2: Moyens de réduction du bruit (ISO 11690-2:1996)
La présente partie de l'ISO 11690 traite des aspects techniques de la réduction du bruit sur les lieux de travail. Les différents moyens techniques sont donnés, les grandeurs acoustiques liées décrites, la valeur de la réduction du bruit discutée et les méthodes de vérification esquissées. La présente partie de l'ISO 11690 ne traite que des sons audibles.
NOTE 1 L'annexe K donne la liste des Normes internationales et autres publications relatives aux moyens de réduction du bruit.
Akustika - Priporočena praksa za oblikovanje tihih delovnih mest - 2. del: Ukrepi za obvladovanje hrupa (ISO 11690-2:1996)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-1997
$NXVWLND3ULSRURþHQDSUDNVD]DREOLNRYDQMHWLKLKGHORYQLKPHVWGHO 8NUHSL]D
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Acoustics - Recommended practice for the design of low-noise workplaces containing
machinery - Part 2: Noise control measures (ISO 11690-2:1996)
Akustik - Richtlinien für die Gestaltung lärmarmer maschinenbestückter Arbeitsstätten -
Teil 2: Lärmminderungsmaßnahmen (ISO 11690-2:1996)
Acoustique - Pratique recommandée pour la conception de lieux de travail a bruit réduit
contenant des machines - Partie 2: Moyens de réduction du bruit (ISO 11690-2:1996)
Ta slovenski standard je istoveten z: EN ISO 11690-2:1996
ICS:
13.140 Vpliv hrupa na ljudi Noise with respect to human
beings
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 IS0
STANDARD 11690-2
First edition
1996-l I-01
Acoustics - Recommended practice for
the design of low-noise workplaces
containing machinery -
Part 2:
Noise control measures
Acoustique - Pratique recommandke pour la conception de lieux de travail
2 bruit rkduit contenant des machines -
Partie 2: Moyens de kduction du bruit
Reference number
IS0 11690-2: 1996(E)
IS0 11690=2:1996(E)
Page
Contents
1 Scope .
................................................................... 1
2 Normative reference
3 Definitions .
............................................. 1
4 Technical aspects of noise control
............................................................... 2
5 Noise control at source
...................................... 6
6 Noise control on the transmission path
7 Noise control at the work station .
8 Verification methods .
9 New technologies . 10
Annexes
................ 11
A Modification or replacement of machine components
.................................................. 12
B Arrangement of sound sources
.................................................................................. 13
C Enclosures
D Silencers .
.......................................... 16
E Noise barriers and screens in rooms
................................................ 17
F Acoustical treatment of surfaces
................................................ 19
G Structure-borne sound insulation
H Airborne sound insulation of partitions .
I Noise control at the work station .
..................................................... 22
J Example of a new technology
................................................................................ 24
K Bibliography
0 IS0 1996
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
IS0 11690=2:1996(E)
@ IS0
Foreword
IS0 (the International Organization for Standardization) is a worldwide fed-
eration 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 collabo-
rates closely with the International Electrotechnical Commission (IEC) on
all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are cir-
culated 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 11690-2 was prepared by Technical Committee
ISOmC 43, Acoustics, Subcommittee SC 1, Noise.
IS0 11690 consists of the following parts, under the general title Acous-
tics - Recommended practice for the design of low-noise workplaces
containing machinery:
Par? I: Noise control strategies
Part 2: Noise control measures
- Part 3: Sound propagation and noise prediction in workrooms
Part 1 is the central document in the series. Parts 2 and 3 give additional
technical and explanatory information. It is therefore recommended to start
with part 1.
Annexes A to K of this part of IS0 11690 are for information only.
. . .
III
IS0 11690-2: 1996(E) @ IS0
Introduction
Most of the existing International Standards prepared in lSO/TC 43/SC 1
specify methods for measurement and/or evaluation of noise. The final
objective of IS0 11690, however, is noise reduction.
A number of noise control measures are offered. However, in order to be
effective, the most appropriate noise control measure(s) should be chosen
for a given situation.
It is important when non-acoustic engineers are involved in noise control
practice for these engineers to have a basic knowledge of noise emission
and propagation characteristics and to understand the basic principles of
noise control.
To assist in the development of noise control in the workplace, it is essen-
tial that the information contained in these recommended practices is dis-
seminated through International Standards.
In order to reduce noise as a hazard in the workplace, individual countries
have produced national legislation. Generally, such national legislation
requires noise control measures to be carried out in order to achieve the
lowest reasonable levels of noise emission, noise immission and noise ex-
posure, taking into account:
known available measures;
the state of the art regarding technical progress;
- the treatment of noise at source;
- appropriate planning, procurement and installation of machines and
equipment.
This part of IS0 11690, together with the two other parts in the series, out-
lines procedures to be considered when dealing with noise control at
workplaces, within workrooms and in the open. These recommended prac-
tices give in relatively simple terms the basic information necessary for all
parties involved in noise control in workplaces and in the design of low-
noise workplaces to promote the understanding of the desired noise control
requirements.
The purpose of the IS0 11690 series is to bridge the gap between existing
literature on noise control and the practical implementation of noise control
measures. In principle, the series applies to all workplaces and its main
function is:
- to provide sim ple, brief info rmation on some aspects of noise control
in
workplaces;
- to act as a guide to help in the understanding of requirements in stan-
dards, directives, text books, manuals, reports and other specialized
technical documents;
@ IS0 IS0 11690=2:1996(E)
to provide assistance in decision making when assessing the various
-
measures available.
The IS0 11690 series should be useful to persons such as plant person-
nel, health and safety officers, engineers, managers, staff in planning and
purchasing departments, architects and suppliers of plants, machines and
equipment. However, the above-mentioned parties should keep in mind
that adherence to the recommendations of the IS0 11690 series is not all
that is necessary to create a safe workplace.
The effects of noise on health, well-being and human activity are many. By
giving guidelines for noise control strategies and measures, the IS0 11690
series aims at a reduction of the impact of noise on human beings at
workplaces. Assessment of the impact of noise on human beings is dealt
with in other documents.
V
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IS0 11690-2: 1996(E)
INTERNATIONAL STANDARD 0 IS0
Acoustics - Recommended practice for the design of low-noise
workplaces containing machinery -
Part 2:
Noise control measures
1 Scope 3 Definitions
For the purposes of this part of IS0 11690, the defini-
This part of IS0 11690 deals with the technical
tions given in IS0 11690-I apply.
aspects of noise control in workplaces. The various
technical measures are stated, the related acoustical
quantities described, the magnitude of noise reduction
discussed and the verification methods outlined.
4 Technical aspects of noise control
This part of IS0 11690 deals only with audible sound.
Noise reduction measures can be applied at source
(emission), between the source and the receiver
NOTE 1 Annex K lists relevant International Standards
(transmission path), and at the work station (receiver).
and other literature on noise control measures.
(See figure 1.)
When dealing with the noise emission of a machine, an
installation or a production process, etc., all possible
noise reduction measures should be considered (see
clause 5 and IS0 11690-l). To determine whether
noise emission is as low as reasonably practicable, it
2 Normative reference
is necessary to consider noise emission quantities;
these are given in the noise emission declaration (see
The following standard contains provisions which,
IS0 11690-I :1996, clause 8) or determined by meas-
through reference in this text, constitute provisions of
urements (carried out in compliance with the relevant
this part of IS0 11690. At the time of publication, the
standard).
edition indicated was valid. All standards are subject to
revision, and parties to agreements based on this part
An assessment of noise control devices such as en-
of IS0 11690 are encouraged to investigate the
closures, partial enclosures, barriers and screens, si-
possibility of applying the most recent editions of the
lencers, etc. can be carried out by using, for example,
standards indicated below. Members of IEC and IS0
the insertion loss data (see 6.2).
maintain registers of currently valid International Stan-
dards.
The acoustic quality of workrooms and buildings is as-
sessed with reference to the sound insulation regard-
ing airborne and structure-borne sound (see 6.4), and
IS0 11690-l :I 996, Acoustics - Recommended prac-
that of workrooms with reference to sound propagation
tice for the design of low-noise workplaces containing
parameters (see 6.3).
machinery - Part I: Noise control strategies.
IS0 11690-2: 1996(E) @ IS0
Receiving point
c
Noise source Transmission path
(work station)
. , 0.
(Secondary noise controt)
(Primary noise control)
Figure 1 - Basic aspects of noise control
The overall effectiveness of noise control measures is and machines. They should be implemented at the
design stage because retrospective measures can
determined from the noise immission values at the
work stations. affect operational requirements and are generally
more expensive. However, they are also recom-
Generally, people located at a work station or in the
mended for existing noise sources, when practicable.
vicinity of a machine are affected by the direct noise
emitted by the machine. Therefore, to reduce noise in
Noise control at source in workplaces deals in particu-
the workplace, the most effective solution is to reduce
lar with the noise reduction of existing machines, the
noise at source (primary measures). Additional meas-
development and selection of low-noise working proc-
ures on the transmission paths (secondary measures)
esses and production technologies, the replacement
may be impractical because they hinder the work task
of machine parts and the assessment of the results
and the production process. When assessing the state
obtained.
of noise reduction technology, low noise emission of
sound sources is therefore given high priority with re-
The effectiveness of noise control at source is based
gard to occupational safety.
on measurements and is assessed by comparison
with the noise emission data, for example, provided by
The basic aspects of noise control (see also
the supplier/manufacturer (see IS0 11690-I :I 996,
IS0 11690-I) are illustrated in figure 1. These are
clause 8).
reviewed in clauses 5 to 7.
In order to minimize noise at the workplace, all noise
control measures should be considered a priori (see
5.2 Noise control at source by design
figure 2).
When machine noise (or noise from technical produc-
Noise control is most effective if it is carried out when
tion equipment) is considered, two types of noise gen-
planning, modifying, changing existing machinery or
eration should be distinguished: fluid dynamic noise
equipment, or when acquiring new machinery or
generation (gas and/or liquid) and mechanical genera-
equipment in plants, workrooms and buildings. From
tion.
the outset, all parties involved (see IS0 11690-I :I 996,
clause 6) and, in particular, the noise experts, should
Fluid dynamic noise arises from temporary fluctuations
take part in the process. Noise control measures are
in pressure and velocity of fluids. Examples are com-
most effective if they are integrated at the design
bustion processes, fans, blow-out openings and
stage of machines, production processes, workrooms
hydraulic systems.
and tasks (see IS0 11690-I :I 996, clause
...
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