EN ISO 354:2003
(Main)Acoustics - Measurement of sound absorption in a reverberation room (ISO 354:2003)
Acoustics - Measurement of sound absorption in a reverberation room (ISO 354:2003)
ISO 354:2003 specifies a method of measuring the sound absorption coefficient of acoustical materials used as wall or ceiling treatments, or the equivalent sound absorption area of objects, such as furniture, persons or space absorbers, in a reverberation room. It is not intended to be used for measuring the absorption characteristics of weakly damped resonators.
The results obtained can be used for comparison purposes and for design calculation with respect to room acoustics and noise control.
Akustik - Messung der Schallabsorption in Hallräumen (ISO 354:2003)
Diese Internationale Norm beschreibt ein Hallraum-Verfahren zur Messung des Schallabsorptionsgrades von akustischen Materialien, die zur Bekleidung von Wänden und Decken benutzt werden, oder der äquivalenten Schallabsorptionsfläche von Einzelobjekten, wie Möbelstücken, Personen oder Absorptionskörpern. Das Verfahren ist nicht für die Messung der Absorptionseigenschaften schwach gedämpfter Resonatoren vorgesehen.
Die erhaltenen Ergebnisse können zu Vergleichszwecken und für Entwurfsberechnungen in der Raumakustik und der Lärmbekämpfung verwendet werden.
Acoustique - Mesurage de l'absorption acoustique en salle réverbérante (ISO 354:2003)
L'ISO 354:2003 spécifie une méthode de mesurage en salle réverbérante du coefficient d'absorption acoustique de matériaux acoustiques utilisés pour le traitement de murs ou de plafonds, ou de la surface d'absorption acoustique équivalente d'objets distincts tels que meubles, personnes ou matériaux absorbants. Elle n'est pas destinée a être employée pour le mesurage des caractéristiques d'absorption de résonateurs faiblement amortis.
Les résultats obtenus peuvent être utilisés pour effectuer des comparaisons et des calculs dans le domaine de l'acoustique des salles et du contrôle du bruit.
Akustika - Merjenje absorpcije zvoka v odmevnici - (ISO 354:2003)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2004
1DGRPHãþD
SIST EN 20354:1998
SIST EN 20354:1998/A1:1998
Akustika - Merjenje absorpcije zvoka v odmevnici - (ISO 354:2003)
Acoustics - Measurement of sound absorption in a reverberation room (ISO 354:2003)
Akustik - Messung der Schallabsorption in Hallräumen (ISO 354:2003)
Acoustique - Mesurage de l'absorption acoustique en salle réverbérante (ISO 354:2003)
Ta slovenski standard je istoveten z: EN ISO 354:2003
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 354
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2003
ICS 91.120.20 Supersedes EN ISO 354:1993
English version
Acoustics - Measurement of sound absorption in a reverberation
room (ISO 354:2003)
Acoustique - Mesurage de l'absorption acoustique en salle Akustik - Messung der Schallabsorption in Hallräumen
réverbérante (ISO 354:2003) (ISO 354:2003)
This European Standard was approved by CEN on 23 April 2003.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 354:2003 E
worldwide for CEN national Members.
CORRECTED 2003-09-24
Foreword
This document (EN ISO 354:2003) has been prepared by Technical Committee ISO/TC 43
"Acoustics" in collaboration with Technical Committee CEN/TC 126 "Acoustic properties of
building products and of buildings", the secretariat of which is held by AFNOR.
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 November 2003, and conflicting national
standards shall be withdrawn at the latest by November 2003.
This document supersedes EN ISO 354:1993.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and
the United Kingdom.
Endorsement notice
The text of ISO 354:2003 has been approved by CEN as EN ISO 354:2003 without any
modifications.
NOTE Normative references to International Standards are listed in Annex ZA (normative).
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of
any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications, indicated
by (mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 266 1997 Acoustics - Preferred frequencies EN ISO 266 1997
INTERNATIONAL ISO
STANDARD 354
Second edition
2003-05-15
Acoustics — Measurement of sound
absorption in a reverberation room
Acoustique — Mesurage de l'absorption acoustique en salle
réverbérante
Reference number
ISO 354:2003(E)
©
ISO 2003
ISO 354:2003(E)
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ii © ISO 2003 — All rights reserved
ISO 354:2003(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope. 1
2 Normative references . 1
3 Terms and definitions. 1
4 Principle . 3
5 Frequency range . 3
6 Test arrangement. 3
6.1 Reverberation room and diffusion of sound field . 3
6.2 Test specimens . 4
6.3 Temperature and relative humidity . 5
7 Measurement of reverberation time. 5
7.1 General. 5
7.2 Interrupted noise method. 6
7.3 Integrated impulse response method. 7
7.4 Evaluation of reverberation times based on decay curves . 9
8 Expression of results. 9
8.1 Method of calculation . 9
8.2 Precision . 11
8.3 Presentation of results . 12
9 Test report . 13
Annex A (normative) Diffusivity of the sound field in the reverberation room. 14
Annex B (normative) Test specimen mountings for sound absorption tests. 15
Bibliography . 21
ISO 354:2003(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 carried out through ISO
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. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 354 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 2, Building
acoustics.
This second edition cancels and replaces the first edition (ISO 354:1985), which has been technically revised,
as follows:
an integrated impulse response method has been introduced;
the requirement to measure at least 36 decays has been added;
mounting conditions according to ISO 354:1985:Amd.1:1997 and mounting conditions Type B and Type J
have been introduced.
iv © ISO 2003 — All rights reserved
ISO 354:2003(E)
Introduction
When a sound source operates in an enclosed space, the level to which reverberant sound builds up, and the
subsequent decay of reverberant sound when the source is stopped, are governed by the sound-absorbing
characteristics of the boundary surfaces, the air filling the space, and objects within the space. In general, the
fraction of the incident sound power absorbed at a surface depends upon the angle of incidence. In order to
relate the reverberation time of an auditorium, office, workshop, etc., to the noise reduction that would be
effected by an absorbing treatment, knowledge of the sound-absorbing characteristics of the surfaces, usually
in the form of a suitable average over all angles of incidence, is required. Since the distribution of sound
waves in typical enclosures includes a wide and largely unpredictable range of angles, a uniform distribution is
taken as the basic condition for the purposes of standardization. If, in addition, the sound intensity is
independent of the location within the space, the sound distribution is called a diffuse sound field, and the
sounds reaching a room surface are said to be at random incidence.
The sound field in a properly designed reverberation room closely approximates a diffuse field. Hence, sound
absorption measured in a reverberation room closely approximates the sound absorption that would be
measured under the basic conditions assumed for standardization.
The purpose of this International Standard is to promote uniformity in the methods and conditions of
measurement of sound absorption in reverberation rooms.
INTERNATIONAL STANDARD ISO 354:2003(E)
Acoustics — Measurement of sound absorption
in a reverberation room
1 Scope
This International Standard specifies a method of measuring the sound absorption coefficient of acoustical
materials used as wall or ceiling treatments, or the equivalent sound absorption area of objects, such as
furniture, persons or space absorbers, in a reverberation room. It is not intended to be used for measuring the
absorption characteristics of weakly damped resonators.
The results obtained can be used for comparison purposes and for design calculation with respect to room
acoustics and noise control.
2 Normative references
The following referenced documents are indispensable for the application 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 266, Acoustics ― Preferred frequencies
ISO 9613-1, Acoustics ― Attenuation of sound during propagation outdoors ― Part 1: Calculation of the
absorption of sound
...
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