EN ISO 14257:2001
(Main)Acoustics - Measurement and parametric description of spatial sound distribution curves in workrooms for evaluation of their acoustical performance (ISO 14257:2001)
Acoustics - Measurement and parametric description of spatial sound distribution curves in workrooms for evaluation of their acoustical performance (ISO 14257:2001)
Akustik - Messung und Parametrisierung von Schallausbreitungskurven in Arbeiträumen zum Zweck der Beurteilung der akustischen Qualität der Räume (ISO 14257:2001)
Diese Internationale Norm legt ein Verfahren zur messtechnischen Bestimmung der Schallausbreitungskurve(n) in einem vorhandenen Arbeitsraum fest. Außerdem wird ein Verfahren zur Bestimmung zweier Kenngrößen für die raumakustischen Eigenschaften eines Arbeitsraumes aus den Messdaten festgelegt. Die Beschreibungsgrößen sind die Schalldruckpegelüberhöhung verglichen mit Freifeldbedingungen und die Schalldruckpegelabnahme je Abstandsverdopplung.
Diese Internationale Norm befasst sich nicht mit der Beurteilung der akustischen Qualität im Hinblick auf Sprachverständlichkeit oder andere psychologische Faktoren.
Unter der Voraussetzung, dass die Anzahl der Mikrofonpositionen die Durchführung der Regressionsrechnung erlaubt, ist diese Internationale Norm anwendbar auf Arbeitsräume jeder beliebigen Form und Größe.
Acoustique - Mesurage et description paramétrique des courbes de décroissance sonore spatiale dans les locaux de travail en vue de l'évaluation de leur performance acoustique (ISO 14257:2001)
La présente Norme internationale spécifie une méthode de mesurage de la (des) courbe(s) de décroissance sonore spatiale d'un local de travail donné. Une méthode est fournie pour déterminer, à partir des données mesurées, deux descripteurs de la performance acoustique d'un local de travail vis à vis de la réduction du bruit, à savoir l'amplification du niveau de pression acoustique par rapport au champ libre et le taux de décroissance spatiale du niveau de pression acoustique par doublement de la distance. La présente Norme internationale ne traite pas de l'évaluation de la qualité acoustique vis-à-vis de la communication parlée ou d'autres facteurs psychologiques. La présente Norme internationale s'applique aux locaux de travail de toute forme et de toutes dimensions pourvu que le nombre de positions microphoniques permette le calcul de régression.
Akustika – Merjenje in parametrični opis krivulj prostorske porazdelitve zvoka v delovnih prostorih za vrednotenje njihovih akustičnih lastnosti (ISO 14257:2001)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2002
$NXVWLND±0HUMHQMHLQSDUDPHWULþQLRSLVNULYXOMSURVWRUVNHSRUD]GHOLWYH]YRNDY
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Acoustics - Measurement and parametric description of spatial sound distribution curves
in workrooms for evaluation of their acoustical performance (ISO 14257:2001)
Akustik - Messung und Parametrisierung von Schallausbreitungskurven in Arbeiträumen
zum Zweck der Beurteilung der akustischen Qualität der Räume (ISO 14257:2001)
Acoustique - Mesurage et description paramétrique des courbes de décroissance sonore
spatiale dans les locaux de travail en vue de l'évaluation de leur performance acoustique
(ISO 14257:2001)
Ta slovenski standard je istoveten z: EN ISO 14257:2001
ICS:
17.140.01 $NXVWLþQDPHUMHQMDLQ Acoustic measurements and
EODåHQMHKUXSDQDVSORãQR noise abatement in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 14257
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2001
ICS 13.140
English version
Acoustics - Measurement and parametric description of spatial
sound distribution curves in workrooms for evaluation of their
acoustical performance (ISO 14257:2001)
Acoustique - Mesurage et description paramétrique des Akustik - Messung und Parametrisierung von
courbes de décroissance sonore spatiale dans les locaux Schallausbreitungskurven in Arbeiträumen zum Zweck der
de travail en vue de l'évaluation de leur performance Beurteilung der akustischen Qualität der Räume (ISO
acoustique (ISO 14257:2001) 14257:2001)
This European Standard was approved by CEN on 5 October 2001.
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,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
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© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14257:2001 E
worldwide for CEN national Members.
prEN ISO 14257:2001 (E)
CORRECTED 2001-12-12
Foreword
The text of the International Standard ISO 14257:2001 has been prepared by Technical
Committee ISO/TC 43 "Acoustics" in collaboration with 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 April 2002, and conflicting national
standards shall be withdrawn at the latest by April 2002.
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, Iceland, Ireland, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of the International Standard ISO 14257:2001 was approved by CEN as a European
Standard without any modification.
NOTE: Normative references to International Standards are listed in annex ZA (normative).
prEN ISO 14257:2001 (E)
(normative)
Annex ZA
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 3741 1999 Acoustics - Determination of sound EN ISO 3741 1999
power levels of noise sources using
sound pressure - Precision
methods for reverberation rooms
ISO 3744 1994 Acoustics - Determination of sound EN ISO 3744 1995
power levels of noise sources using
sound pressure - Engineering
method in an essentially free field
over a reflecting plane
ISO 6926 2000 Acoustics - Requirements for the EN ISO 6926 2001
performance and calibration of
reference sound sources used for
the determination of sound power
levels
INTERNATIONAL ISO
STANDARD 14257
First edition
2001-10-15
Acoustics — Measurement and parametric
description of spatial sound distribution
curves in workrooms for evaluation of their
acoustical performance
Acoustique — Mesurage et description paramétrique des courbes de
décroissance sonore spatiale dans les locaux de travail en vue de
l'évaluation de leur performance acoustique
Reference number
ISO 14257:2001(E)
©
ISO 2001
ISO 14257:2001(E)
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ii © ISO 2001 – All rights reserved
ISO 14257:2001(E)
Contents Page
Foreword.iv
Introduction.v
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
4 Sound distribution in a room.3
4.1 General.3
4.2 Spatial sound distribution curves.3
5 Measurement of the spatial sound distribution curve.5
5.1 Specifications regarding the sound source used for the test .5
5.2 Measurement instrumentation .6
5.3 Measurement path and points.7
5.4 Measurement procedure .8
5.5 Representation of the measured data .8
6 Parametric description of the measured spatial sound distribution curve in view of evaluation
of the acoustical performance of workrooms.9
6.1 General.9
6.2 Distance ranges .9
6.3 Determination of the rate of spatial decay of sound pressure levels per distance doubling,DL .9
6.4 Determination of the excess of sound pressure level with respect to a reference sound
distribution curve,DL .10
f
6.5 Evaluation of measured data.12
7 Information to be recorded and reported.12
Annex A (normative) Performance requirements for the sound source to be used for the test .14
Annex B (normative) Correction of measured sound distribution curves to account for differences in
ground reflections and source directivity.16
Annex C (informative) Example of use of this International Standard .17
Bibliography.25
ISO 14257:2001(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 3.
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 International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 14257 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee
SC 1, Noise.
Annexes A and B form a normative part of this International Standard. Annex C is for information only.
iv © ISO 2001 – All rights reserved
ISO 14257:2001(E)
Introduction
According to ISO 11690-1, the spatial sound distribution in a workroom is described by a curve characterizing the
sound pressure level from a point source with a known sound power level, and with steady emission and
omnidirectional sound radiation as a function of the distance from the source. This International Standard specifies
a method for the determination of that spatial sound distribution curve, and for the derivation of two characteristics
(rate of spatial decay of sound pressure levels per distance doubling and excess of sound pressure level) for the
room in question.
Data obtained using this International Standard are of use for the following:
� acoustical qualification of a room with respect to noise control;
� determination of appropriate positions of a machine and of work stations in a room;
� assessment of the necessity to increase the sound absorption in the room;
� qualitative estimation of the potential performance of screens installed in the room;
� calculation of the noise-immission levels to be expected when machines with known emission are operated at
specified positions in the room.
SIST EN ISO 14257
...
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