oSIST prEN ISO 11654:2018

SLOVENSKI STANDARD
oSIST prEN ISO 11654:2017
01-december-2017
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Acoustics - Sound absorbers - Rating of sound absorption coefficients (ISO/DIS
11654:2017)
Akustik - Schallabsorber - Bewertung von Schallabsorptionsgraden (ISO/DIS
11654:2017)
Acoustique - Absorbants - Évaluation des coefficients d'absorption acoustique (ISO/DIS
11654:2017)
Ta slovenski standard je istoveten z: prEN ISO 11654
ICS:
17.140.01 $NXVWLþQDPHUMHQMDLQ Acoustic measurements and
EODåHQMHKUXSDQDVSORãQR noise abatement in general
91.120.20 $NXVWLNDYVWDYEDK=YRþQD Acoustics in building. Sound
L]RODFLMD insulation
oSIST prEN ISO 11654:2017 de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 11654:2017
oSIST prEN ISO 11654:2017
DRAFT INTERNATIONAL STANDARD
ISO/DIS 11654
ISO/TC 43/SC 2 Secretariat: DIN
Voting begins on: Voting terminates on:
2017-10-04 2017-12-27
Acoustics — Sound absorbers — Rating of sound
absorption coefficients
Acoustique — Absorbants — Évaluation de l'absorption acoustique coefficient
ICS: 91.120.20
THIS DOCUMENT IS A DRAFT CIRCULATED
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ISO/DIS 11654:2017(E)
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PROVIDE SUPPORTING DOCUMENTATION. ISO 2017

oSIST prEN ISO 11654:2017
ISO/DIS 11654:2017(E)
© ISO 2017, Published in Switzerland
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oSIST prEN ISO 11654:2017
ISO/DIS 11654:2017(E)
Contents Page
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Calculation. 2
4.1 Practical sound absorption coefficient . 2
4.2 Weighted sound absorption coefficient . 2
4.3 Shape indicators . 2
5 Presentation of results . 3
5.1 α values . 3
S
5.2 α values . 3
P
5.3 α values and shape indicators (normative) . 4
w
5.4 α values, shape indicators and low frequency absorption (optional) . 4
w
5.5 Other information . 4
Annex A (informative) Examples of calculations of α , with and without a shape indicator . 6
W
Annex B (informative) Example of a standardized diagram for α values . 8
S
iii
oSIST prEN ISO 11654:2017
ISO/DIS 11654:2017(E)
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
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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. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all
matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
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The committee responsible for this document is ISO/TC 43 Acoustics, Sub-Committee SC 2 Building
acoustics.
This second edition cancels and replaces the first edition which has been technically revised.

iv
oSIST prEN ISO 11654:2017
DRAFT INTERNATIONAL STANDARD ISO/DIS 11654:2017(E)

Acoustics — Sound absorbers — Rating of sound absorption
coefficients
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.
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. 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. This International Standard is, in principle, applicable to all products for which the
sound absorption coefficient has been determined in accordance with ISO 354.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 354:2003, Acoustics — Measurement of sound absorption in a reverberation room
3 Terms and definitions
For the purposes of this document, the following terms and defin
...