EN ISO 140-7:1998

SLOVENSKI STANDARD
01-november-1999
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Acoustics - Measurement of sound insulation in buildings and of building elements - Part
7: Field measurements of impact sound insulation of floors (ISO 140-7:1998)
Akustik - Messung der Schalldämmung in Gebäuden und von Bauteilen - Teil 7:
Messung der Trittschalldämmung von Decken in Gebäuden (ISO 140-7:1998)
Acoustique - Mesurage de l'isolation acoustique des immeubles et des éléments de
construction - Partie 7: Mesurage in situ de la transmission des bruits de choc par les
planchers (SO 140-7:1998)
Ta slovenski standard je istoveten z: EN ISO 140-7:1998
ICS:
17.140.01 $NXVWLþQDPHUMHQMDLQ Acoustic measurements and
EODåHQMHKUXSDQDVSORãQR noise abatement in general
91.060.30 Stropi. Tla. Stopnice Ceilings. Floors. Stairs
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.

INTERNATIONAL ISO
STANDARD 140-7
Second edition
1998-08-15
Acoustics — Measurement of sound
insulation in buildings and of building
elements —
Part 7:
Field measurements of impact sound insulation
of floors
Acoustique — Mesurage de l'isolation acoustique des immeubles et des
éléments de construction —
Partie 7: Mesurage in situ de la transmission des bruits de choc par les
planchers
A
Reference number
ISO 140-7:1998(E)
ISO 140-7:1998(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 140-7 was prepared by Technical Committee
ISO/TC 43, Acoustics, Subcommittee SC 2, Building acoustics.
This second edition cancels and replaces the first edition
(ISO 140-7:1978), 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 measurement 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 façade
elements and façades
— Part 6: Laboratory measurements of impact sound insulation of floors
©  ISO 1998
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 iso@iso.ch
Printed in Switzerland
ii
©
ISO ISO 140-7:1998(E)
— 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
Annexes A and B form an integral part of this part of ISO 140. Annexes C
to E are for information only.
iii
©
INTERNATIONAL STANDARD  ISO ISO 140-7:1998(E)
Acoustics — Measurement of sound insulation in buildings and of
building elements —
Part 7:
Field measurements of impact sound insulation of floors
1 Scope
This part of ISO 140 specifies field methods for measuring the impact sound insulation properties of building floors
by using a standard tapping machine. The method is applicable to bare floors and also to floors with coverings.
The results obtained can be used to compare the impact sound insulation properties of floors and to compare the
apparent impact sound insulation of floors with specified requirements.
NOTE 1 Laboratory measurements of impact sound insulation of floors are dealt with in ISO 140-6.
NOTE 2 Laboratory measurements of the reduction of transmitted impact noise by floor coverings on a heavyweight standard
floor are dealt with in ISO 140-8.
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 140-2:1991, Acoustics — Measurement of sound insulation in buildings and of building elements — Part 2:
Determination, verification and application of precision data.
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 354:1985, Acoustics — Measurement of sound absorption in a reverberation room.
ISO 717-2: 1996, Acoustics — Rating of sound insulation in buildings and of building elements — Part 2: Impact
sound insulation.
IEC 60651:1979, Sound level meters.
IEC 60804:1985, Integrating-averaging sound level meters.
IEC 60942: 1988, Sound calibrators.
IEC 61260:1995, Electroacoustics — Octave band filters and fractional — Octave band filters.
©
ISO
ISO 140-7:1998(E)
3 Definitions
For the purposes of this part of ISO 140, the definitions given in ISO 140-3 and the following definitions apply.
3.1 average sound pressure level in a room, L: Ten times the logarithm to the base 10 of the ratio of the space
and time average of the sound pressure squared to the square of the reference sound pressure, the space average
being taken over the entire room with the exception of those parts where the direct radiation of a sound source or
the near field of the boundaries (wall, etc.) is of significant influence; it is expressed in decibels.
In practice, usually the sound pressure levels L are measured. In this case L is determined by
j
n
� �
1 L / 10
j
� �
L = 10 lg 10 dB . . . (1)
�
� �
n
Ł
j =1 ł
where L are the sound pressure levels L to L at n different positions in the room.
j 1 n
3.2 impact sound pressure level, L: Average sound pressure level in a one-third-octave band in the receiving
i
room when the floor under test is excited by the standardized impact sound source; it is expressed in decibels.
3.3 normalized impact sound pressure level, L¢ : Impact sound pressure level L increased by a correction term
n i
which is given in decibels, being ten times the logarithm to the base 10 of the ratio of the measured equivalent
absorption area A of the receiving room to the reference equivalent absorption area A ; it is expressed in decibels:
A
LL¢= +10 lg dB . . . (2)
n
i
A
with A = 10 m .
3.4 standardized impact sound pressure level, L¢ : Impact sound pressure level L reduced by a correction
nT i
term which is given in decibels, being ten times the logarithm to the base 10 of the ratio of the measured
reverberation time T of the receiving room to the reference reverberation time T ; it is expressed in decibels:
T
LL¢= - 10 lg dB . . . (3)
i
n
T
T
NOTE 1 For dwellings T equals 0,5 s.
NOTE 2 The standardizing of the impact sound pressure level to a reverberation time of 0,5 s takes into account that in
dwellings the reverberation time has been found to be (nearly independent of the volume and of the frequency) equal to 0,5 s.
NOTE 3 The standardizing of the impact sound pressure level to the reverberation time of T = 0,5 s is equivalent to
standardizing the impact sound pressure level to a reference absorption area of
AV = 0,32
where
A is the reference absorption area, in square metres;
V is the volume of the receiving room, in cubic metres.
3.5 reduction of impact sound pressure level, DL¢: Difference, in decibels, between the average sound pressure
levels in the receiving room before and after the installation of, for example, a floor covering.
NOTE  See ISO 140-8 for further information.
©
ISO
ISO 140-7:1998(E)
4 Equipment
The equipment shall comply with the requirements of clause 5.
The standard tapping machine shall meet the requirements given in annex A.
The accuracy of the sound level measurement equipment shall comply with the requirements of accuracy class 0 or
1 defined in IEC 60651 and IEC 60804. If not otherwise stated by the equipment manufacturer, the complete
measuring system including the microphone shall be adjusted before each measurement using a sound calibrator
which complies with the requirements of accuracy class 1 defined in IEC 60942. For sound level meters calibrated
for measurements in sound fields of progressive plane waves, corrections for the diffuse sound field shall be
applied.
The filters shall comply with the requirements defined in IEC 61260.
The reverberation time measurement equipment shall comply with the requirements defined in ISO 354.
NOTE  For pattern evaluation (type testing) and regular verification tests, recommended procedures for sound level meters are
[1] [2]
given in OIML R 58 and OIML R 88 .
5 Test procedure and evaluation
5.1 General
The field measurements of impact sound insulation of floors shall be made in one-third-octave bands unless octave
band measurements have been agreed upon. When the results from octave band measurements are converted to
single-number quantities, these results are not directly comparable with those from one-third-octave band
measurements. The procedure for octave band measurements is specified in annex B.
5.2 Generation of sound field
The impact sound shall be generated by the tapping machine (see clause 4).
The tapping machine shall be placed in at least four different positions randomly distributed on the floor under test.
The distance of the tapping machine from the edges of the floor shall be at least 0,5 m. In the case of anisotropic
floor constructions (with ribs, beams, etc.), more positions may be necessary. The hammer connecting line should
be orientated at 45° to the direction of the beams or ribs.
The impact sound pressure levels may reveal a time dependency after the tapping is started. In such a case the
measurements should not begin until the noise level has become steady. If stable conditions are not reached after 5
min, then the measurements should be carried out over a well-defined measurement period. The measurement
period shall be reported.
When floors with soft coverings are under test, the standard tapping machine shall fulfil the special requirements
given in annex A. Advice regarding the mounting of the standard tapping machine on soft floor coverings is given
also in annex A.
5.3 Measurement of impact sound pressure level
5.3.1 General
Obtain the impact sound pressure level by using a single microphone moved from position to position, or by an
array of fixed microphones, or by a continuously moving or oscillating microphone. The sound pressure levels at the
different microphone positions shall be averaged on an energy basis [see equation (1)] for all positions of the
tapping machine.
©
ISO
ISO 140-7:1998(E)
5.3.2 Microphone positions
The following are minimum separating distances:
— 0,7 m between microphone positions;
— 0,5 m between any microphone position and room boundaries or diffusers;
— 1,0 m between any microphone position and the upper floor being excited by the tapping machine.
NOTE  Greater separating distances should be used wherever possible.
a) Fixed microphone positions
A minimum of four fixed microphone positions shall be used; these shall be evenly distributed within the space
permitted for measurement in the room.
b) Moving microphone positions
When using a moving microphone, the sweep radius shall be at least 0,7 m. The plane of the traverse shall be
inclined in order to cover a large proportion of the space permitted for measurement. The plane of traverse shall not
lie within 10° of any plane of the room (wall, floor, ceiling). The duration of a traverse period shall not be less than
15 s.
5.3.3 Measurement
a) Fixed microphone positions
The minimum number of measurements using fixed microphone positions is six, a combination of at least four
microphone positions and at least four tapping machine positions shall be used.
EXAMPLE  For two microphone and two tapping machine positions, make measurements for all four possible combinations.
For the other two microphone and two tapping machine positions, make measurements on a one-to-one basis.
b) Moving microphone positions
The minimum number of measurements using a moving microphone is four (e.g. one measurement for each
tapping machine position).
When using six or eight tapping machine positions, measurements
...