EN ISO 140-1:1997

SLOVENSKI STANDARD
SIST EN ISO 140-1:1998
01-avgust-1998
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Acoustics - Measurement of sound insulation in buildings and of building elements - Part
1: Requirements for laboratory test facilities with suppressed flanking transmission (ISO
140-1:1997)
Akustik - Messung der Schalldämmung in Gebäuden und von Bauteilen - Teil 1:
Anforderungen an Prüfstände mit unterdrückter Flankenübertragung (ISO 140-1:1997)
Acoustique - Mesurage de l'isolement acoustique des immeubles et des éléments de
construction - Partie 1: Spécifications relatives aux laboratoires sans transmissions
latérales (ISO 140-1:1997)
Ta slovenski standard je istoveten z: EN ISO 140-1:1997
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 140-1:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 140-1:1998

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SIST EN ISO 140-1:1998

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SIST EN ISO 140-1:1998

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SIST EN ISO 140-1:1998

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SIST EN ISO 140-1:1998

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SIST EN ISO 140-1:1998
INTERNATIONAL ISO
STANDARD 140-1
Third edition
1997-10-15
Acoustics — Measurement of sound
insulation in buildings and of building
elements —
Part 1:
Requirements for laboratory test facilities with
suppressed flanking transmission
Acoustique — Mesurage de l'isolement acoustique des immeubles et des
éléments de construction —
Partie 1: Spécifications relatives aux laboratoires sans transmissions
latérales
A Reference number
ISO 140-1:1997(E)

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SIST EN ISO 140-1:1998
ISO 140-1:1997(E)
Contents
1  Scope .1
2  Normative references .1
3  Laboratory test facilities for airborne sound insulation measurements under diffuse field conditions.1
3.1  Rooms.1
3.2  Test opening.2
3.2.1  Walls and floors .2
3.2.2  Doors and similar components .3
3.2.3  Windows and glazings .3
4  Laboratory test facilities for impact sound insulation measurements of floors and floor coverings .4
4.1  Receiving room.4
4.2  Test opening.4
Annexes
A  Estimation of the maximum achievable sound reduction index.5
B  Measurement of the sound reduction index of the filler wall (and any flanking construction) for test
openings for windows and glazings.8
C  Test opening for the measurement of the sound insulation of glazing .10
©  ISO 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 • CH-1211 Genève 20 • 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 140-1:1998
© ISO
ISO 140-1:1997(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.
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 ISO 140-1 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee
SC 2, Building acoustics.
This third edition cancels and replaces the second edition (ISO 140-1:1990), which has been technically revised.
ISO 140 consists of the following parts, under the general title Acoustics — Measurement of sound insulation in
buildings and of building elements:
— Part 1: Requirements of laboratory test facilities with suppressed flanking transmission
— Part 2: Determination, verification and application of precision data
— Part 3: Laboratory measurements of airborne sound insulation of building elements
— Part 4: Field measurements of airborne sound insulation between rooms
— Part 5: Field measurements of airborne sound insulation of facade elements and facades
— Part 6: Laboratory measurements of impact sound insulation of floors
— Part 7: Field measurements of impact sound insulation of floors
— Part 8: Laboratory measurements of the reduction of transmitted impact noise by floor coverings on a
heavyweight standard floor
— Part 9: Laboratory measurement of room-to-room airborne sound insulation of a suspended ceiling with a
plenum above it
— Part 10: Laboratory measurement of airborne sound insulation of small building elements
— Part 12: Laboratory measurement of room-to-room airborne and impact sound insulation of an access floor
Annexes A and B form an integral part of this part of ISO 140. Annex C is for information only.
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SIST EN ISO 140-1:1998

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SIST EN ISO 140-1:1998
INTERNATIONAL STANDARD   © ISO ISO 140-1:1997(E)
Acoustics — Measurement of sound insulation in buildings and of
building elements —
Part 1:
Requirements for laboratory test facilities with suppressed flanking
transmission
1 Scope
This part of ISO 140 lays down specifications concerning laboratory test facilities for sound insulation
measurements of building elements. It applies to laboratory test facilities with suppressed radiation from flanking
elements; and/ or structural isolation between source and receiving rooms.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this part of
ISO 140. At the time of publication, the editions indicated were valid. All standards are subject to revision, and
parties to agreements based on this part of ISO 140 are encouraged to investigate the possibility of applying the
most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid
International Standards.
ISO 140-3:1995, Acoustics — Measurement of sound insulation in buildings and of building elements — Part 3:
Laboratory measurements of airborne sound insulation of building elements.
ISO 140-8:1997, Acoustics — Measurement of sound insulation in buildings and of building elements — Part 8:
Laboratory measurements of the reduction of transmitted impact noise by floor coverings on a heavyweight
standard floor.
3 Laboratory test facilities for airborne sound insulation measurements under diffuse
field conditions
The laboratory test facility consists of two adjacent reverberant rooms with a test opening between them in which
the test specimen is inserted.
3.1 Rooms
Volumes and corresponding dimensions of the two test rooms should not be exactly the same. A difference in room
volumes and/or in the linear dimensions of at least 10 % is recommended. The volumes of the test rooms shall be at
3
least 50 m .
Choose the ratios of the room dimensions such that the modal frequencies in the low-frequency bands are spaced
as uniformly as possible.
1

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SIST EN ISO 140-1:1998
© ISO
ISO 140-1:1997(E)
NOTE — Theoretical calculation as well as experiments have indicated that it is probably advisable, when measuring walls or
floors, that the specimen should cover a total partition wall or ceiling of the test room, i.e. the test opening should extend from
3 3
wall to wall and/or from ceiling to floor. In such a case, a volume of 50 m to 60 m is appropriate in view of the recommended
size of the test opening.
Large variations of the sound pressure level in the room indicate the presence of dominating strong standing waves.
In this case it is necessary to install diffusing elements in the rooms. Evaluate by experiments the positions and the
necessary number of elements with the goal that the sound reduction index is not influenced when further diffusing
elements are installed.
The reverberation time in the rooms under normal test conditions (with negligible absorption by the test object)
should not be excessively long or short. Where the reverberation time at low frequencies exceeds 2 s, or is less
than 1 s, check whether the measured sound reduction index depends on the reverberation time. When such a
dependence is found, even with diffusers in the rooms, the room shall be modified to adjust the reverberation time,
T, in seconds, at low test frequencies such that
23/
12 s s≤≤TV/50
()
where V is the value of the room volume, in cubic metres.
The background noise level in the receiving room shall be sufficiently low to permit measurements of the sound
transmitted from the source room, considering the power output in the source room and the sound insulation of the
specimens for which the laboratory is intended.
In laboratory test facilities for measuring the sound reduction index, the sound transmitted by any indirect path
should be negligible compared with the sound transmitted through the test specimen. One way to achieve this in
such facilities is to provide sufficient structural isolation between source and receiving room. Another method might
be to cover all surfaces of both rooms with linings that reduce the flanking transmission sufficiently.
Methods for the estimation of the maximum achievable sound reduction index R' , which is determined by indirect
max
paths are given in annex A.
The measured sound reduction index of a specimen is affected by the internal loss factor of the structures
surrounding the specimen. The mass ratio of the tested structure to the surrounding ones are to be taken into
2
account. For tests on lightweight structures ( < 150 kg/m ) there are no special related requirements to be taken
m
into account. For heavier structures under test it should be ensured that the power dissipation of the surrounding
structures is such that the loss factor of the test specimen is not less than
h
h =+001 03
,,/f
min
where f is the value of test frequency, in hertz.
2
To check this requirement, use a brick or block wall having a mass of (400 ± 40) kg/m plastered on one side as the
test object. For measurement of the loss factor see ISO 140-3:1995, annex E.
3.2 Test opening
3.2.1 Walls and floors
2 2 2
The area of the test opening should be approximately 10 m for walls, and between 10 m and 20 m for floors, with
the length of the shorter edge not less than 2,3 m for both walls and floors.
A test opening with a smaller area may be used, if the wavelength of free flexural waves at the lowest frequency
considered is smaller than half the minimum dimensions of the specimen. The smaller the specimen, however, the
more sensitive the results will be to edge constraint conditions and to local variations in sound fields. The sound
insulation of the specimen itself is also dependent on the size. If appropriate, it is recommended to use the test
opening for glazings described in annex C.
2

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SIST EN ISO 140-1:1998
© ISO
ISO 140-1:1997(E)
3.2.2 Doors and similar components
2
For tests of doors and similar components, a test opening with an area of less than 10 m may be appropriate. The
test opening for doors shall be so arranged that the lower edge is situated near to the level of the floor of the test
rooms such that conditions in the building are reproduced.
3.2.3 Windows and glazings
2
A test opening with an area of less than 10 m may also be appropriate for tests on glazing samples or window
assemblies. These shall be inserted into a filler wall built into the test aperture between the two rooms.
The filler wall shall comply with the following requirements:
a) its sound insulation at any test frequency shall be such that the sound energy transmitted through the wall is at
least 6 dB, but preferably more than 15 dB lower than that transmitted by the test specimen (a method for
testing the sound insulation of the filler wall including any flanking transmission is given in annex B);
b) the total
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