Acoustics - Sound absorbers for use in buildings - Rating of sound absorption (ISO 11654:1997)

Akustik - Schallabsorber für die Anwendung in Gebäuden - Bewertung der Schallabsorption (ISO 11654:1997)

Die Einzahlbewertung nach dieser Internationalen Norm kann verwendet werden, um Anforderungen zu formulieren und um akustische Eigenschaften von schallabsorbierenden Produkten zu beschreiben, die für Routineanwendungen in üblichen Büros, Fluren, Klassenzimmern, Krankenhäusern usw. vorgesehen sind. Die Bewertung ist ungeeignet, wenn die Produkte in einer anspruchsvollen Umgebung eingesetzt werden sollen, die eines sorgfältigen akustischen Entwurfs mittels Fachwissens bedarf. In solchen Fällen sind nur vollständige frequenzabhängige Schallabsorptionswerte geeignet.

Acoustique - Absorbants pour l'utilisation dans les bâtiments - Evaluation de l'absorption acoustique (ISO 11654:1997)

1.1 La présente Norme internationale prescrit une méthode permettant de conventir en un indice d'évaluation unique l'ensemble des valeurs de l'indice d'absorption acoustique aux différentes fréquences. En premier lieu, les valeurs de l'indice d'absorption par bandes de tiers d'octave mesurées conformément à l'ISO 354 sont converties en valeurs par bandes d'octave.L'annexe B donne, à titre d'information, une méthode de classement basée sur ces indices.1.2 L'indice d'évaluation unique spécifié dans la présente Norme internationale peut être utilisée pour formuler des exigences et pour décrire les propriétés absorbantes de produits destinés aux bureaux ordinaires, corridors, salles de classe, hôpitaux, etc. L'évaluation n'est pas appropriée lorsque les produits sont destinés à une utilisation dans des environnements qualifiés exigeant une conc 1626eption soignée sur le plan acoustique et faisant appel à une certaine expertise. Dans de tels cas, seul l'ensemble complet des valeurs de l'absorption aux différentes fréquences est satisfaisant.La présente Norme internationale n'est utilisable qu'à condition que les applications couvrent la totalité du domaine de fréquences correspondant à la courbe de référence. Si l'on ne s'intéresse qu'à une partie de ce domaine, il peut être plus approprié de rechercher des produits ayant une bonne absorption dans cette partie seulement. Les indicateurs de forme décrits dans la présente Norme internationale fournissent quelques indications permettant de trouver des produits présentant une bonne efficacité dans un domaine de fréquences restreint alors que leur indice d'évaluation est relativement bas. De tels produits devraient être jugés d'après la courbe d'absorption complète.Dans la présente Norme internationale, la courbe d'évaluation étant limitée vers le bas à la bande d'octave de 250 Hz, l'évaluation n'est pas appropriée au-dessous de cette fréquence. Si de telles basses fréquences sont concernées, l'ensemble de la

Akustika - Absorberji zvoka za uporabo v stavbah - Vrednotenje zvočne absorpcije (ISO 11654:1997)

General Information

Status
Published
Publication Date
31-Oct-1999
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Nov-1999
Due Date
01-Nov-1999
Completion Date
01-Nov-1999

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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 11654:1999
01-november-1999
$NXVWLND$EVRUEHUML]YRND]DXSRUDERYVWDYEDK9UHGQRWHQMH]YRþQHDEVRUSFLMH
,62
Acoustics - Sound absorbers for use in buildings - Rating of sound absorption (ISO
11654:1997)
Akustik - Schallabsorber für die Anwendung in Gebäuden - Bewertung der
Schallabsorption (ISO 11654:1997)
Acoustique - Absorbants pour l'utilisation dans les bâtiments - Evaluation de l'absorption
acoustique (ISO 11654:1997)
Ta slovenski standard je istoveten z: EN ISO 11654:1997
ICS:
91.120.20 $NXVWLNDYVWDYEDK=YRþQD Acoustics in building. Sound
L]RODFLMD insulation
SIST EN ISO 11654:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 11654:1999

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SIST EN ISO 11654:1999

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SIST EN ISO 11654:1999

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SIST EN ISO 11654:1999
INTERNATIONAL IS0
STANDARD 11654
First edition
1997-04-O 1
Acoustics
- Sound absorbers for use in
buildings - Rating of sound absorption
Acousticye - Absorban ts pour I’utilisation dans /es 62 timen ts -
evaluation de /‘absorption acoustique
Reference number
IS0 11654: 1997(E)

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SIST EN ISO 11654:1999
IS0 11654: 1997(E)
Contents Page
1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1
2 Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3
4 Calculation . . . . . . . . . . . . . . . . . . . . . . . .~. 2
5 Presentation of results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Annexes
A Examples of calculations of a, with and without a shape
5
indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B Classification of sound absorbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
7
C Example of a standardized diagram for as values . . . . . . . . . . . . . . . . . . . .
0 IS0 1997
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
Internet central @ iso.ch
x.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
ii

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SIST EN ISO 11654:1999
@ IS0
IS0 11654:1997(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
(IEC) 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 11654 was prepared by Technical Committee
ISO/TC 43, Acoustics, Subcommittee SC 2, Building acoustics.
Annexes A, B and C of this International Standard are for information only.

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SIST EN ISO 11654:1999
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SIST EN ISO 11654:1999
INTERNATIONAL STANDARD @ Iso IS0 11654: 1997(E)
Acoustics - Sound absorbers for use in buildings -
Rating of sound absorption
1 Scope
1.1 This International Standard specifies a method by which the frequency-dependent values of the sound
absorption coefficient can be converted into a single number. Before this is done, the one-third-octave band values
of the sound absorption coefficient measured in accordance with IS0 354 are converted into octave bands.
In annex B a classification method, based on these single numbers, is given for information.
1.2 The single-number rating specified in this International Standard can be used to formulate requirements and to
describe acoustical properties of sound-absorbing products to be used for routine applications in normal offices,
corridors, class rooms, hospitals, etc. The rating is not appropriate when the products are to be used in qualified
environments requiring careful acoustical design by expertise. In such cases, only complete sound absorption data
as a function of frequency are satisfactory.
This International Standard is not applicable unless the applications cover the whole frequency range of the
reference curve. If only a part of this range is of interest, it may be more appropriate to look for products with a good
sound absorption within this range only. The shape indicators described in this International Standard give some
guidance in identifying such products which may have a relatively low single number but a much higher potential if a
more restricted frequency range is considered. Such products should be judged from the complete sound
absorption curve.
As the rating curve in this International Standard has as a lower limit the 250 Hz octave band, the rating is not
appropriate below this frequency. If such low frequencies are of interest, reference must be made to the complete
sound absorption curve.
This International Standard is, in principle, applicable to all building products for which the sound absorption
coefficient has been determined in accordance with IS0 354. It is, however, often not suitable for application to
single items, such as chairs, baffles, etc., nor is it applicable to road barriers and road surfaces.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, 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 recent editions of the standards indicated below. Members of IEC and IS0 maintain
registers of currently valid International Standards.
- Measurement of sound absorption in a reverberation room.
IS0 354:1985, Acoustics
IS0 354:1985/Amd. 1: --I), Annex D: Test specimen mountings for sound absorption tests.
1) To be published.

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SIST EN ISO 11654:1999
@ IS0
IS0 11654: 1997(E)
3 Definitions
For the purposes of this International Standard, the following definitions apply.
3.1 practical sound absorption coefficient, aP: Frequency-dependent value of the sound absorption coefficient
which is based on measurements on one-third-octave bands in accordance with IS0 354 and which is calculated in
octave bands in accordance with this International Standard.
NOTE - For the value in the jth octave band, the notation api is used.
3.2 weighted sound absorption coefficient, a,: Single-number frequency-independent value which equals the
value of the reference curve at 500 Hz after shifting it as specified in this I
...

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