SIST EN ISO 3382-3:2012
(Main)Acoustics - Measurement of room acoustic parameters - Part 3: Open plan offices (ISO 3382-3:2012)
Acoustics - Measurement of room acoustic parameters - Part 3: Open plan offices (ISO 3382-3:2012)
This document specifies methods for the measurement of room acoustic properties in open plan spaces, with or without furnishing. It describes measurement procedures, the apparatus needed, the coverage required, and the method for evaluating the data and presenting the test report. The measurement results can be used to evaluate room acoustic properties in various open plan spaces, such as in open plan schools, call centres, open plan offices of different sizes. This standard is not meant for ordinary rooms, concert halls and other performance spaces.
Akustik - Messung von Parametern der Raumakustik - Teil 3: Großraumbüros (ISO 3382-3:2012)
Diese Internationale Norm legt Verfahren zur Messung der raumakustischen Eigenschaften in möblierten
Großraumbüros fest. Beschrieben werden die Messverfahren, die Prüfeinrichtung, die erforderliche
Messpunktdichte und das Verfahren zur Bewertung der Daten und der Angabe des Prüfberichts.
Die Messergebnisse können angewendet werden, um die in Großraumbüros gegebenen raumakustischen
Eigenschaften zu bewerten. Die vorliegende Norm ist für Großraumbüros mit mittlerem oder großem Volumen
anzuwenden.
Acoustique - Mesurage des paramètres acoustiques des salles - Partie 3: Bureaux ouverts (ISO 3382-3:2012)
L'ISO 3382-3:2012 spécifie les méthodes de mesurage des propriétés acoustiques des salles dans les bureaux ouverts avec mobilier. Elle décrit les modes opératoires de mesurage, l'appareillage nécessaire, la couverture requise et la méthode d'évaluation des données et de présentation du rapport d'essai.
Les résultats des mesurages peuvent être utilisés pour évaluer les propriétés acoustiques des salles dans les bureaux ouverts. L'ISO 3382-3:2012 est destinée à être utilisée pour les bureaux ouverts de moyennes et grandes dimensions.
Akustika - Merjenje parametrov prostorske akustike - 3. del: Velike odprte pisarne (ISO 3382-3:2012)
Ta dokument določa metode za merjenje akustičnih lastnosti opremljenih ali neopremljenih odprtih prostorov. Opisuje merilne postopke, potrebne naprave, zahtevano pokritost ter metodo za vrednotenje podatkov in predstavitev poročila o preskusu. Rezultati meritev se lahko uporabijo za vrednotenje akustičnih lastnosti različnih odprtih prostorov, kot so šole, klicni centri in pisarne različnih velikosti. Ta standard ni namenjen za običajne prostore, koncertne dvorane in druge prireditvene prostore.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 3382-3:2012
01-april-2012
Akustika - Merjenje parametrov prostorske akustike - 3. del: Velike odprte pisarne
(ISO 3382-3:2012)
Acoustics - Measurement of room acoustic parameters - Part 3: Open plan offices (ISO
3382-3:2012)
Akustik - Messung von Parametern der Raumakustik - Teil 3: Großraumbüros (ISO 3382
-3:2012)
Acoustique - Mesurage des paramètres acoustiques des salles - Partie 3: Bureaux
ouverts (ISO 3382-3:2012)
Ta slovenski standard je istoveten z: EN ISO 3382-3:2012
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
SIST EN ISO 3382-3:2012 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 3382-3:2012
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SIST EN ISO 3382-3:2012
EUROPEAN STANDARD
EN ISO 3382-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2012
ICS 91.120.20
English Version
Acoustics - Measurement of room acoustic parameters - Part 3:
Open plan offices (ISO 3382-3:2012)
Acoustique - Mesurage des paramètres acoustiques des Akustik - Messung von Parametern der Raumakustik - Teil
salles - Partie 3: Bureaux ouverts (ISO 3382-3:2012) 3: Durchgehende Räume (ISO 3382-3:2012)
This European Standard was approved by CEN on 14 January 2012.
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 CEN-CENELEC 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 CEN-CENELEC Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3382-3:2012: E
worldwide for CEN national Members.
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SIST EN ISO 3382-3:2012
EN ISO 3382-3:2012 (E)
Contents Page
Foreword .3
2
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SIST EN ISO 3382-3:2012
EN ISO 3382-3:2012 (E)
Foreword
This document (EN ISO 3382-3:2012) has been prepared by Technical Committee ISO/TC 43 "Acoustics" in
collaboration with the Technical Committee CEN/TC 126 “Acoustic properties of building elements 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 August 2012, and conflicting national standards shall be withdrawn at
the latest by August 2012.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 3382-3:2012 has been approved by CEN as a EN ISO 3382-3:2012 without any modification.
3
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SIST EN ISO 3382-3:2012
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SIST EN ISO 3382-3:2012
INTERNATIONAL ISO
STANDARD 3382-3
First edition
2012-01-15
Acoustics — Measurement of room
acoustic parameters —
Part 3:
Open plan offices
Acoustique — Mesurage des paramètres acoustiques des salles —
Partie 3: Bureaux ouverts
Reference number
ISO 3382-3:2012(E)
©
ISO 2012
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SIST EN ISO 3382-3:2012
ISO 3382-3:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2012
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 either ISO at the address below or ISO’s
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Published in Switzerland
ii © ISO 2012 – All rights reserved
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SIST EN ISO 3382-3:2012
ISO 3382-3:2012(E)
Contents Page
Foreword .iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Single number quantities . 2
5 Measurement conditions . 3
5.1 Equipment . 3
5.2 Measurement procedure . 3
6 Determination of single number quantities . 6
6.1 Sound power spectrum of normal speech . 6
6.2 Spatial decay rate of A-weighted sound pressure level of speech . 6
6.3 Distraction and privacy distances . 9
6.4 Background noise . 9
7 Test report . 9
Annex A (informative) Examples of target values for evaluation of measurement data . 11
Annex B (informative) Relation between speech transmission index and work performance.12
Bibliography .14
© ISO 2012 – All rights reserved iii
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SIST EN ISO 3382-3:2012
ISO 3382-3:2012(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 3382-3 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 2, Building acoustics.
ISO 3382 consists of the following parts, under the general title Acoustics — Measurement of room
acoustic parameters:
— Part 1: Performance spaces
— Part 2: Reverberation time in ordinary rooms
— Part 3: Open plan offices
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SIST EN ISO 3382-3:2012
ISO 3382-3:2012(E)
Introduction
The phrase “open plan offices” in the context of this part of ISO 3382 covers offices and similar spaces where
a large number of people can work, have a conversation, or concentrate independently in well-defined work
stations. In open plan offices, the occupants are affected by activities surrounding them. Insufficient acoustic
conditions lead to distraction and a lack of speech privacy. Distraction weakens the ability to concentrate and
reduces productivity, especially in tasks requiring cognitive resources. Low speech privacy prevents confidential
or partly confidential conversations. Speech can be intrusive for the listener, whereas for the speaker, it can be
desirable to avoid involuntary spread of speech of a private nature.
The design of open plan spaces includes careful consideration of the layout of the workstations and mutual
arrangement of teams or workgroups. Other factors affecting the acoustical performance of open plan
spaces are sound absorption, height of screens and storage units, background noise, degree of workstation
enclosure, distance between workstations, and room dimensions. The reverberation time of a room used to
be regarded as the predominant indicator of its acoustical properties. However, there is evidence that other
types of measurements such as rate of spatial decay of sound pressure levels, speech transmission index
and background noise levels are needed for a more complete evaluation. If reverberation time is considered
relevant, it should be measured in accordance with ISO 3382-2.
This part of ISO 3382 specifies a measurement method which results in single number quantities indicating
the general acoustical performance of open plan offices. The principal aim is good speech privacy between
workstations. The measurement method and resulting single number quantities correspond well with perceived
acoustic conditions of the worker.
Furniture strongly affects acoustic conditions. Therefore, the measurements are performed only when the
room is completely finished, including furniture. Measurement in an unfurnished room does not describe the
perceived acoustical conditions. It is also important that the measurements are carried out when people are
absent, but with the normal daytime background noise, whether it is caused by ventilation, traffic noise or an
artificial masking sound system. If people are present, the background noise level varies strongly with time and
the determination of reliable results becomes impossible.
The single number quantities are designed to represent the situation where a single person is talking and the
rest are silent. Therefore, the measurements are made by using a single loudspeaker. If many people speak
simultaneously, the masking is increased and the degree of distraction gets weaker (see Reference [10]).
Therefore, the results describe the most distracting situation. However, this part of ISO 3382 can be used to
determine the room acoustic quality of, for example, call centres where many speakers are active continuously.
In such cases, the sound environment caused by many simultaneous speakers may cause a positive speech
masking effect and the results of this part of ISO 3382 may underestimate the perceived speech privacy.
© ISO 2012 – All rights reserved v
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SIST EN ISO 3382-3:2012
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SIST EN ISO 3382-3:2012
INTERNATIONAL STANDARD ISO 3382-3:2012(E)
Acoustics — Measurement of room acoustic parameters —
Part 3:
Open plan offices
1 Scope
This part of ISO 3382 specifies methods for the measurement of room acoustic properties in open plan offices
with furnishing. It specifies measurement procedures, the apparatus needed, the coverage required, the
method for evaluating the data, and the presentation of the test report.
The measurement results can be used to evaluate room acoustic properties in open plan offices. This part of
ISO 3382 is intended for medium and large size open plan offices.
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 3382-1, Acoustics — Measurement of room acoustic parameters — Part 1: Performance spaces
ISO 3740, Acoustics — Determination of sound power levels of noise sources — Guidelines for the use of
basic standards
ISO 3744, Acoustics — Determination of sound power levels and sound energy levels of noise sources using
sound pressure — Engineering methods for an essentially free field over a reflecting plane
ISO 14257, Acoustics — Measurement and parametric description of spatial sound distribution curves in
workrooms for evaluation of their acoustical performance
ISO 16032, Acoustics — Measurement of sound pressure level from service equipment in buildings —
Engineering method
IEC 61672-1, Electroacoustics — Sound level meters — Part 1: Specifications
IEC 61260, Electroacoustics — Octave-band and fractional-octave-band filters
IEC 60268-16:2011, Sound system equipment — Part 16: Objective rating of speech intelligibility by speech
transmission index
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
spatial sound distribution of the A-weighted sound pressure level of speech
curve which shows how the A-weighted sound pressure level decreases as a function of the distance from the
sound source emitting noise with the sound power spectrum of normal speech
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SIST EN ISO 3382-3:2012
ISO 3382-3:2012(E)
3.2
spatial decay rate of speech
D
2,S
rate of spatial decay of A-weighted sound pressure level of speech per distance doubling
NOTE This definition is an application of DL defined in ISO 14257, but using the spectrum of normal speech and
2
A-weighting over the whole frequency range. The spatial decay is not determined for individual octave bands.
3.3
A-weighted sound pressure level of speech at a distance of 4 m
L
p,A,S,4 m
nominal A-weighted sound pressure level of normal speech at a distance of 4,0 m from the sound source
NOTE The measurement position does not need to be located at this distance from the sound source. L is obtained
p,A,S,4 m
using a linear regression line from the spatial sound distribution of the A-weighted sound pressure level (SPL) of speech.
3.4
speech transmission index
STI
physical quantity representing the transmission quality of speech with respect to intelligibility
[IEC 60268-16:2011]
3.5
spatial sound distribution of the speech transmission index
curve which shows how the speech transmission index decreases from a reference sound source when
distance increases
3.6
distraction distance
r
D
distance from speaker where the speech transmission index falls below 0,50
NOTE 1 Distraction distance is expressed in metres.
NOTE 2 Above the distraction distance, concentration and privacy start to improve rapidly (see References [8][14]).
3.7
privacy distance
r
P
distance from speaker where the speech transmission index falls below 0,20
NOTE 1 Privacy distance is expressed in metres.
NOTE 2 Above the privacy distance, concentration and privacy are experienced very much the same as between
separate office rooms (see References [8][14]). STI values less than 0,20 are difficult to achieve in offices with poor speech
privacy or small volume.
3.8
background noise level
L
p,B
sound pressure level in octave bands present at the workstation during working hours with people absent
NOTE Background noise here means all such continuous sounds, which are not caused by people, e.g. heating,
ventilation and air conditioning (HVAC) devices, environmental traffic noise, office equipment or a sound-masking system.
4 Single number quantities
The sound pressure levels and STI shall be measured in octave bands from 125 Hz to 8 000 Hz. STI shall be
determined in accordance with the full method specified in IEC 60268-16.
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SIST EN ISO 3382-3:2012
ISO 3382-3:2012(E)
The measurement data shall be converted into four simple single number quantities to facilitate the use in
acoustic design and to enable the future establishment of simple target values. The single number quantities
that are determined are:
— distraction distance, r ;
D
— spatial decay rate of A-weighted SPL of speech, D ;
2,S
— A-weighted SPL of speech at 4 m, L ;
p,A,S,4 m
— average A-weighted background noise level, L .
p,A,B
In addition to these, STI in the nearest workstation and the privacy distance, r , may also be determined.
P
5 Measurement conditions
5.1 Equipment
5.1.1 Sound source. In all measurements an omnidirectional sound source producing pink noise shall be
used. Alternatively, it is also possible to use deterministic signals that have a pink spectrum like maximum-length
sequence (MLS) or sweeps to measure the impulse response and derive the results from that (see Reference [13]).
An omnidirectional sound source is used since people in an open plan office do not continuously speak in any
fixed direction. The requirements given in ISO 3382-1 for the omnidirectional sound source shall be fulfilled for
measurements to be in accordance with this part of ISO 3382. Verification of the sound power of the source is
performed as in ISO 3382-1, with the sound source positioned at the height of 1,2 m.
5.1.2 Microphone. Sound pressure levels in each octave band and at each microphone position shall be
measured using a sound level meter meeting the requirements of IEC 61672-1, class 1. The microphone shall
be omnidirectional (taking into account any supplementary equipment connected to it). Octave-band filters shall
comply with IEC 61260.
If the signal is recorded (e.g. by using analogue or digital recorders) for off-line processing, it shall be ensured
that the instrumentation as a whole complies with the above-mentioned requirements.
5.2 Measurement procedure
5.2.1 Measurement conditions
Measurements in accordance with this part of ISO 3382 shall be made in furnished rooms, but without the
presence of people, except the persons needed to carry out the measurements.
The background noise level is measured and applied for the determination of the STI value. The HVAC devices
and other noise sources shall operate on the same power as during typical working hours. If the sources
operate at reduced power, the STI values are too high, leading to overestimation of r and r . If the office is
D P
equipped with a sound-masking system, it shall be switched on during the measurement.
Measurements in accordance with this part of ISO 3382 have to be carried out when people are absent.
Thus the noise from people talking in the room is not included in the measured background noise level. It is
recognized that noise from people talking in the open plan office can sometimes cause a positive masking
effect (see Reference [10]). In such cases, the actual distraction distance and privacy distance are shorter than
the measured r and r , respectively. The evaluation of the acoustic conditions with people talking is not within
D P
the scope of this part of ISO 3382.
5.2.2 Measurement positions
It is recommended that measurements be carried out along a line which crosses over workstations, as shown
in Figure 1. The preferred number of successive measurement positions in
...
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