SIST ISO 140-6:1997

Acoustics -- Measurement of sound insulation in buildings and of building elements -- Part 6: Laboratory measurements of impact sound insulation of floors

Acoustique -- Mesurage de l'isolation acoustique des immeubles et des éléments de construction -- Partie 6: Mesurage en laboratoire de l'isolation des sols aux bruits de chocs

Akustika - Merjenje zvočne izolirnosti v zgradbah in zvočne izolirnosti gradbenih elementov - 6. del: Laboratorijska merjenja izolirnosti medetažnih konstrukcij pred udarnim zvokom

General Information

• Status: Withdrawn
• Publication Date: 31-Mar-1997
• Withdrawal Date: 31-Oct-1999
• ICS: 17.140.01 - Acoustic measurements and noise abatement in general
• ICS: 91.060.01 - Elements of buildings in general
• ICS: 91.120.20 - Acoustics in building. Sound insulation
• Technical Committee: IGFI - Construction physics
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 01-Nov-1999
• Due Date: 01-Nov-1999
• Completion Date: 01-Nov-1999
• Ref Project: ISO 140-6:1978 - Acoustics — Measurement of sound insulation in buildings and of building elements — Part 6: Laboratory measurements of impact sound insulation of floors

Relations

• Revised: ISO 140-6:1998 - Acoustics — Measurement of sound insulation in buildings and of building elements — Part 6: Laboratory measurements of impact sound insulation of floors
• Effective Date: 12-May-2008

Standards Content (Sample)

INTERNATIONAL STANDARD @ 140 I VI
'aie
~
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.ME~YHAPOnHAR OPrAHM3AUMR fl0 CTAH~APTM3AUMM.ORGANlSATlON INTERNATIONALE DE NORMALISATION
L
Acoustics - Measurement of sound insulation in buildings
and of building elements -
Part VI : Laboratory measurements of impact sound
insulation of floors
Acoustique - Mesurage de l'isolation acoustique des immeubles et des éléments de construction -
Partie VI : Mesurage en laboratoire de l'isolation des sols aux bruits de chocs
First edition - 1978-07-15
UDC 534.833.522.4.08 Ref. No. IS0 140/Vl-1978 (E)
Descriptors : acoustics, acoustic measurement, acoustic insulation, buildings, structural members, floors, tests, testing conditions, labora-
tory tests, shock waves.
Price based on 5 pages

---------------------- Page: 1 ----------------------
FOREWORD
IS0 (the International Organization for Standardization) is a worldwide federation
of national standards institutes (IS0 member bodies). The work of developing
International Standards is carried out through IS0 technical committees. Every
member body interested in a subject for which a technical committee has been set
up 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.
Draft International Standards adopted by the technical committees are circulated
to the member bodies for approval before their acceptance as International
Standards by the IS0 Council.
International Standard IS0 140/V I was developed by Technical Committee
ISO/TC 43, Acoustics, and was circulated to the member bodies in May 1976.
It has been approved by the member bodies of the following countries :
Australia India Romania
Austria Israel South Africa, Rep. of
Belgium Italy Spain
Canada Japan Sweden
Switzerland
Czechoslovakia Korea, Rep. of
Denmark Mexico Turkey
Finland Netherlands United Kingdom
France New Zealand U.S.A.
Germany Norway U.S.S.R.
Hungary Poland
No member body expressed disapproval of the document.
This International Standard, together with International Standards IS0 140/1, II I,
IV, VI and VII, cancel and replace IS0 Recommendation R 140-1960, of which
they constitute a technical revision.
Annex B is an integral part of this International Standard.
O International Organization for Standardization, 1978 0
Printed in Switzerland

---------------------- Page: 2 ----------------------
INTERNATIONAL STANDARD IS0 140/VI-1978 (E)
Acoustics - Measurement of sound insulation in buildings
and of building elements -
Part VI : Laboratory measurements of impact sound
insulation of floors
3 DEFINITIONS
1 SCOPE AND FIELD OF APPLICATION
3.1 average sound pressure level in a room : Ten times the
This International Standard specifies a laboratory method
common logarithm of the ratio of the space and time average
of measuring impact noise transmission through floors by
of the sound pressure squared to the square of the reference
using a standard tapping machine.
sound pressure, the space average being taken over the
The results obtained can be used to compare the sound
entire room with the exception of those parts where the
insulation properties of floors and to classify floors ac-
direct radiation of a sound source or the near field of
cording to their sound insulation properties.
the boundaries (wall, etc.) is of significant influence. This
quantity is denoted by L :
NOTES
1 Laboratory measurements of the reduction of transmitted
p: +pi +. .+pi
standard impact machine noise by floor coverings on a standard
L=lOlg dB . . (1)
floor are dealt with in IS0 14O/VIII.
2 Field measurements of impact sound insulation of floors are
dealt with in IS0 14O/Vll.
where
p,,p2,. . .,pn are the r.m.s. sound pressures at n
2 REFERENCES
different positions in the room;
IS0 14011, Acoustics - Measurement of sound insulation
Po = 20 pPa is the reference sound pressure.
in buildings and of building elements - Part I : Require-
ments for laboratories.
3.2 impact sound pressure level : The average sound
I SO 1401 I I, Acoustics - Measurement of sound insulation
pressure level in a specific frequency band in the receiving
in buildings and of building elements - Part II : Statement
room when the floor under test is excited by the stan-
of precision requirements.
dardized impact sound source. This quantity is denoted
by Li.
I SO 1 401 V I I, Acoustics - Measurement of sound insulation
in buildings and of building elements - Part VI1 : Field
3.3 normalized impact sound pressure level : The impact
measurements of impact sound insulation of floors.
sound pressure level Li increased by a correction term
IS0 1401V II I, Acoustics - Measurement of sound in-
which is given in decibels, being ten times the common
sulation in buildings and of building elements - Part Vlll :
logarithm of the ratio between the measured equivalent
Laboratory measurement of the reduction of transmitted
absorption area A of the receiving room and the reference
impact noise by floor coverings on a standard floor.
equivalent absorption area Ao. This quantity is denoted
by L, :
ISOIR 354, Measurement of absorption coefficients in a
reverberation room.
. . (2)
IS01 R 7 1 7, Rating of sound insulation for dwellings.
IEC Publication 179, Precision sound level meters. where A. = 10 m2.
I EC Publication 225, Octave, half-octave and third-octave In all cases where it is uncertain whether results are obtained
without flanking transmission, the normalized impact
band filters intended for the analysis of sound and vi-
sound pressure level should be denoted by Lk.
brations.
1

---------------------- Page: 3 ----------------------
9
IS0 140/V1-1978 (E)
3.4 reduction of impact sound pressure level (improve- The distance between the supports of the tapping machine
ment of impact sound insulation) : The difference between and the hammer line should be at least 1 O0 rnm.
the average sound pressure levels in the receiving room
before and after installation of, for example, a floor cover-
5 TEST ARRANGEMENT
ing; see IS0 14O/VIII. This quantity is denoted by AL.
5.1 Receiving room
Laboratory test facilities should meet the requirements
of IS0 140/1.
4 EQUIPMENT
5.2 Test specimen
The tapping machine being constructed in accordance with
the following specifications serves as a standardized impact
The size of the test specimen is determined by the size of
sound source. The further equipment shall be suitable for
the test opening of the laboratory test facility as it is
meeting the requirements of clause 6.
defined in IS0 140/1, i.e. between 10 m2 and 20 m2 with
the shorter edge length not less than 2,3 m. The size of
The tapping machine should have five hammers placed in a
floor test specimen and elements comprising that specimen
line, the distance between the two end hammers being
should be made as close as possible to the sizes of field
about 400 mm.
installation.
The time between successive impacts should be 100 +_ 5 ms.
NOTE - The test specimen should preferably be installed in a
The effective mass of each hammer should be 0.5 kg
manner as similar as possible to the actual construction with a
(within k 2,5 %).
careful simulation of normal connections and sealing conditions at
the perimeter and at joints within the specimen. The mounting
The drop of a hammer on a flat floor should be equivalent,
conditions should be stated in the test report.
with respect to the momentum, to a free drop without
In laboratories with suppressed radiation from flanking
friction of 40 mm (within +_ 2,5 %).
elements, the sound transmitted by any indirect path
The part of the hammer which strikes the floor should be
should be negligible compared with the sound transmitted
a cylinder of brass or steel, 3 cm in diameter, with a spheri-
through the test specimen.
cal end having a radius of about 50 cm.
Alternatively, especially in the case of a fragile floor cover-
6 TEST PROCEDURE AND EVALUATION
ing, hammers may be used having the part that strikes the
6.1 Generation of sound field
floor coated with a layer of rubber, of which the di-
as
mensions, composition and vulcanization are specified
The impact sound shall be generated by the tapping
follows.
machine (see clause 4). Concerning the position of the
tapping machine, see 6.5.
The hammers with rubber coating should geometrically
resemble the hammers of brass or steel only. The part of
6.2 Measurement of impact sound pressure level
each hammer below a plane perpendicular to the axis of the
cylinder, at 5mm distance from the lowest point of the
The impact sound pressure level in the receiving room
curved end of the hammer, should be of rubber of the com-
should be an average over space and time. This average
v
position and vulcanization ("cure") shown in table 1.
may be obtained by using a number of fixed microphone
positions or a continuously moving microphone with an
TABLE 1 - Specification for rubber for hammer
integration of p2.
Composition Parts by mass
The indicating device should be designed to determine
r.m.s. values of the sound pressure or corresponding
Natural rubber
pressure levels. If a sound level meter is used, it should
15
Zinc oxide conform to IEC Publication 179 for precision sound level
meters. It is recommended to use the meter response
2
Stearic acid
"slow". The complete measuring system including the
Carbon black EPC 40
microphone shall be adjusted before each series of measure-
Phenyl betanaphthylamine
ments to enable absolute values of sound pressure level to
2.2-Benzothiazyl disulphide be obtained. For sound level meters calibrated in a sound
(Altax)
field of progressive plan waves a correction for the diffuse
sound field must be applied. (See IEC Publication 179,
Diphenylguanidine
clause 8.2.)
Sulphur
When in any frequency band the sound pressure level in the
Cure : 45 min a
...

SLOVENSKI STANDARD
SIST ISO 140-6:1997
01-april-1997
$NXVWLND0HUMHQMH]YRþQHL]ROLUQRVWLY]JUDGEDKLQ]YRþQHL]ROLUQRVWLJUDGEHQLK
HOHPHQWRYGHO/DERUDWRULMVNDPHUMHQMDL]ROLUQRVWLPHGHWDåQLKNRQVWUXNFLMSUHG
XGDUQLP]YRNRP
Acoustics -- Measurement of sound insulation in buildings and of building elements --
Part 6: Laboratory measurements of impact sound insulation of floors
Acoustique -- Mesurage de l'isolation acoustique des immeubles et des éléments de
construction -- Partie 6: Mesurage en laboratoire de l'isolation des sols aux bruits de
chocs
Ta slovenski standard je istoveten z: ISO 140-6:1978
ICS:
17.140.01 $NXVWLþQDPHUMHQMDLQ Acoustic measurements and
EODåHQMHKUXSDQDVSORãQR noise abatement in general
91.060.01 Stavbni elementi na splošno Elements of buildings in
general
91.120.20 $NXVWLNDYVWDYEDK=YRþQD Acoustics in building. Sound
L]RODFLMD insulation
SIST ISO 140-6:1997 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST ISO 140-6:1997

---------------------- Page: 2 ----------------------

SIST ISO 140-6:1997
INTERNATIONAL STANDARD @ 140 I VI
'aie
~
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.ME~YHAPOnHAR OPrAHM3AUMR fl0 CTAH~APTM3AUMM.ORGANlSATlON INTERNATIONALE DE NORMALISATION
L
Acoustics - Measurement of sound insulation in buildings
and of building elements -
Part VI : Laboratory measurements of impact sound
insulation of floors
Acoustique - Mesurage de l'isolation acoustique des immeubles et des éléments de construction -
Partie VI : Mesurage en laboratoire de l'isolation des sols aux bruits de chocs
First edition - 1978-07-15
UDC 534.833.522.4.08 Ref. No. IS0 140/Vl-1978 (E)
Descriptors : acoustics, acoustic measurement, acoustic insulation, buildings, structural members, floors, tests, testing conditions, labora-
tory tests, shock waves.
Price based on 5 pages

---------------------- Page: 3 ----------------------

SIST ISO 140-6:1997
FOREWORD
IS0 (the International Organization for Standardization) is a worldwide federation
of national standards institutes (IS0 member bodies). The work of developing
International Standards is carried out through IS0 technical committees. Every
member body interested in a subject for which a technical committee has been set
up 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.
Draft International Standards adopted by the technical committees are circulated
to the member bodies for approval before their acceptance as International
Standards by the IS0 Council.
International Standard IS0 140/V I was developed by Technical Committee
ISO/TC 43, Acoustics, and was circulated to the member bodies in May 1976.
It has been approved by the member bodies of the following countries :
Australia India Romania
Austria Israel South Africa, Rep. of
Belgium Italy Spain
Canada Japan Sweden
Switzerland
Czechoslovakia Korea, Rep. of
Denmark Mexico Turkey
Finland Netherlands United Kingdom
France New Zealand U.S.A.
Germany Norway U.S.S.R.
Hungary Poland
No member body expressed disapproval of the document.
This International Standard, together with International Standards IS0 140/1, II I,
IV, VI and VII, cancel and replace IS0 Recommendation R 140-1960, of which
they constitute a technical revision.
Annex B is an integral part of this International Standard.
O International Organization for Standardization, 1978 0
Printed in Switzerland

---------------------- Page: 4 ----------------------

SIST ISO 140-6:1997
INTERNATIONAL STANDARD IS0 140/VI-1978 (E)
Acoustics - Measurement of sound insulation in buildings
and of building elements -
Part VI : Laboratory measurements of impact sound
insulation of floors
3 DEFINITIONS
1 SCOPE AND FIELD OF APPLICATION
3.1 average sound pressure level in a room : Ten times the
This International Standard specifies a laboratory method
common logarithm of the ratio of the space and time average
of measuring impact noise transmission through floors by
of the sound pressure squared to the square of the reference
using a standard tapping machine.
sound pressure, the space average being taken over the
The results obtained can be used to compare the sound
entire room with the exception of those parts where the
insulation properties of floors and to classify floors ac-
direct radiation of a sound source or the near field of
cording to their sound insulation properties.
the boundaries (wall, etc.) is of significant influence. This
quantity is denoted by L :
NOTES
1 Laboratory measurements of the reduction of transmitted
p: +pi +. .+pi
standard impact machine noise by floor coverings on a standard
L=lOlg dB . . (1)
floor are dealt with in IS0 14O/VIII.
2 Field measurements of impact sound insulation of floors are
dealt with in IS0 14O/Vll.
where
p,,p2,. . .,pn are the r.m.s. sound pressures at n
2 REFERENCES
different positions in the room;
IS0 14011, Acoustics - Measurement of sound insulation
Po = 20 pPa is the reference sound pressure.
in buildings and of building elements - Part I : Require-
ments for laboratories.
3.2 impact sound pressure level : The average sound
I SO 1401 I I, Acoustics - Measurement of sound insulation
pressure level in a specific frequency band in the receiving
in buildings and of building elements - Part II : Statement
room when the floor under test is excited by the stan-
of precision requirements.
dardized impact sound source. This quantity is denoted
by Li.
I SO 1 401 V I I, Acoustics - Measurement of sound insulation
in buildings and of building elements - Part VI1 : Field
3.3 normalized impact sound pressure level : The impact
measurements of impact sound insulation of floors.
sound pressure level Li increased by a correction term
IS0 1401V II I, Acoustics - Measurement of sound in-
which is given in decibels, being ten times the common
sulation in buildings and of building elements - Part Vlll :
logarithm of the ratio between the measured equivalent
Laboratory measurement of the reduction of transmitted
absorption area A of the receiving room and the reference
impact noise by floor coverings on a standard floor.
equivalent absorption area Ao. This quantity is denoted
by L, :
ISOIR 354, Measurement of absorption coefficients in a
reverberation room.
. . (2)
IS01 R 7 1 7, Rating of sound insulation for dwellings.
IEC Publication 179, Precision sound level meters. where A. = 10 m2.
I EC Publication 225, Octave, half-octave and third-octave In all cases where it is uncertain whether results are obtained
without flanking transmission, the normalized impact
band filters intended for the analysis of sound and vi-
sound pressure level should be denoted by Lk.
brations.
1

---------------------- Page: 5 ----------------------

SIST ISO 140-6:1997
9
IS0 140/V1-1978 (E)
3.4 reduction of impact sound pressure level (improve- The distance between the supports of the tapping machine
ment of impact sound insulation) : The difference between and the hammer line should be at least 1 O0 rnm.
the average sound pressure levels in the receiving room
before and after installation of, for example, a floor cover-
5 TEST ARRANGEMENT
ing; see IS0 14O/VIII. This quantity is denoted by AL.
5.1 Receiving room
Laboratory test facilities should meet the requirements
of IS0 140/1.
4 EQUIPMENT
5.2 Test specimen
The tapping machine being constructed in accordance with
the following specifications serves as a standardized impact
The size of the test specimen is determined by the size of
sound source. The further equipment shall be suitable for
the test opening of the laboratory test facility as it is
meeting the requirements of clause 6.
defined in IS0 140/1, i.e. between 10 m2 and 20 m2 with
the shorter edge length not less than 2,3 m. The size of
The tapping machine should have five hammers placed in a
floor test specimen and elements comprising that specimen
line, the distance between the two end hammers being
should be made as close as possible to the sizes of field
about 400 mm.
installation.
The time between successive impacts should be 100 +_ 5 ms.
NOTE - The test specimen should preferably be installed in a
The effective mass of each hammer should be 0.5 kg
manner as similar as possible to the actual construction with a
(within k 2,5 %).
careful simulation of normal connections and sealing conditions at
the perimeter and at joints within the specimen. The mounting
The drop of a hammer on a flat floor should be equivalent,
conditions should be stated in the test report.
with respect to the momentum, to a free drop without
In laboratories with suppressed radiation from flanking
friction of 40 mm (within +_ 2,5 %).
elements, the sound transmitted by any indirect path
The part of the hammer which strikes the floor should be
should be negligible compared with the sound transmitted
a cylinder of brass or steel, 3 cm in diameter, with a spheri-
through the test specimen.
cal end having a radius of about 50 cm.
Alternatively, especially in the case of a fragile floor cover-
6 TEST PROCEDURE AND EVALUATION
ing, hammers may be used having the part that strikes the
6.1 Generation of sound field
floor coated with a layer of rubber, of which the di-
as
mensions, composition and vulcanization are specified
The impact sound shall be generated by the tapping
follows.
machine (see clause 4). Concerning the position of the
tapping machine, see 6.5.
The hammers with rubber coating should geometrically
resemble the hammers of brass or steel only. The part of
6.2 Measurement of impact sound pressure level
each hammer below a plane perpendicular to the axis of the
cylinder, at 5mm distance from the lowest point of the
The impact sound pressure level in the receiving room
curved end of the hammer, should be of rubber of the com-
should be an average over space and time. This average
v
position and vulcanization ("cure") shown in table 1.
may be obtained by using a number of fixed microphone
positions or a continuously moving microphone with an
TABLE 1 - Specification for rubber for hammer
integration of p2.
Composition Parts by mass
The indicating device should be designed to determine
r.m.s. values of the sound pressure or corresponding
Natural rubber
pressure levels. If a sound level meter is used, it should
15
Zinc oxide conform to IEC Publication 179 for precision sound level
meters. It is recommended to
...

140 I VI
NORME INTERNATIONALE
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION*MEMYHAPOI/HAR OPrAHH3AUMR Il0 CTAHL1APTH3AUHH.ORGANlSATlON INTERNATIONALE DE NORMALISATION
Acoustique - Mesurage de l'isolation acoustique des
immeubles et des déments de construction -
Partie VI : Mesurage en laboratoire de l'isolation des sols aux
bruits de chocs
Acoustics - Measurement of sound insulation in buildings and of building elements -
Part VI : Laboratory measurements of impact sound insulation of floors
Première édition - 1978-07-15
Rbf. no : IS0 140/V1-1978 (F)
CDU 534.833.522.4.08
Descripteun : acoustique, mesurage acoustique, isolation acoustique, bâtiment, element de construction, plancher, essai, conditions d'essai,
essai de laboratoire, onde de choc.
5 pages
Prix basé sur

---------------------- Page: 1 ----------------------
AVANT-PROPOS
L'ISO (Organisation internationale de normalisation) est une fédération mondiale
d'organismes nationaux de normalisation (comités membres de I'ISO). L'élaboration
des Normes internationales est confiée aux comités techniques de I'ISO. Chaque
comité membre intéressé par une étude a le droit de faire partie du comité technique
correspondant. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec I'ISO, participent également aux travaux.
Les projets de Normes internationales adoptés par les comités techniques sont
soumis aux comités membres pour approbation, avant leur acceptation comme
Normes internationales par le Conseil de I'ISO.
La Norme internationale IS0 140/VI a été élaborée par le comité technique
ISO/TC 43, Acoustique, et a été soumise aux comités membres en mai 1976.
Les comités membres des pays suivants l'ont approuvée
Afrique du Sud, Rép. d' France Pologne
Allemagne Hongrie Roumanie
Inde Royaume-Uni
Australie
Autriche Israël Suède
Belgique Italie
Suisse
Canada Japon Tchécoslovaquie
Corée, Rép. de Mexique Turquie
Danemark Norvège U. R. S. S.
Espagne Nouvelle-Zélande U.S.A.
Y
Finlande Pays-Bas
Aucun comité membre ne l'a désapprouvée.
Cette Norme internationale, conjointement avec les Normes internationales
IS0 140/1, III, IV et VII, annule et remplace la Recommandation ISO/R 140-1960
dont elle constitue une révision technique.
L'annexe B fait partie intégrante de la présente Norme internationale.
O Organisation internationale de normalisation, 1978 O
Imprimé en Suisse

---------------------- Page: 2 ----------------------
NORME INTERNATIONALE IS0 140/VI-1978 (F)
Acoustique - Mesurage de l'isolation acoustique des
immeubles et des éléments de construction -
Partie VI : Mesurage en laboratoire de l'isolation des sols aux
bruits de chocs
1 OBJET ET DOMAINE D'APPLICATION 3 DÉFINITIONS
La présente Norme internationale spécifie une méthode de 3.1 niveau moyen de pression acoustique dans une pièce :
L
mesurage en laboratoire de la transmission des bruits de Dix fois le logarithme décimal du rapport de la moyenne
chocs au travers des sols au moyen d'une machine à chocs spatio-temporelle des carrés des pressions acoustiques au
nor ma I isée. carré de la pression acoustique de référence, la moyenne
spatiale étant prise dans l'étendue de la pièce, a l'exception
Les résultats obtenus peuvent être utilisés pour comparer
des zones OÙ le rayonnement direct de la source et le champ
l'isolation acoustique des sols et pour classer les sols selon
proche des parois ont une influence notable. Cette grandeur
leur isolation.
est désignée par L et est donnée par la formule :
NOTES
22 2
P, +P2 +. . . +P, dB
1 Les mesurages en laboratoire de la reduction de la transmission
L = 101g . . . (1)
des bruits de chocs par les revetements sur plancher normalise sont
traites dans I'ISO 14O/Vlll.
2 Les mesurages sur place de l'isolation aux bruits de chocs des
où
sols sont traités dans I'ISO 14O/Vll.
p, , pz, . . ., p, sont les pressions acoustiques efficaces
relevées en n points différents de la pièce;
2 RÉFÉRENCES
p, = 20 Pa est la pression acoustique de référence.
IS0 14011, Acoustique - Mesurage de l'isolation acous-
tique des immeubles et des éléments de construction -
Partie I : Spécifications relatives aux laboratoires.
IS0 14011 I, Acoustique - Mesurage de l'isolation acous- 3.2 niveau de pression du bruit de choc: Niveau moyen
L
tique des immeubles et des éléments de construction - de pression acoustique dans une bande de fréquences
Partie II : Spécifications relatives a la fidélité. donnée dans la salle de réception, lorsque le sol en essai est
excité par la source de bruit de choc normalisé. Cette gran-
IS0 1401V I I, Acoustique - Mesurage de l'isolation acous-
deur est désignée par Li.
tique des immeubles et des éléments de construction -
Partie VI1 : Mesurage sur place de l'isolation des sols aux
bruits de chocs.
I SO 1 401V I I I, Acoustique - Mesurage de l'isolation acous- 3.3 niveau de pression du bruit de choc normalisé : Niveau
tique des immeubles et des éléments de construction -
de pression du bruit de choc, augmenté d'un terme correctif
Partie VI11 : Mesurage en laboratoire de la réduction de la
exprimé en décibels, égal à dix fois le logarithme décimal du
transmission des bruits de chocs par les revêtements de sol
rapport de l'aire d'absorption équivalente A mesurée de la
sur plancher normalisé.
salle de réception a l'aire d'absorption équivalente de réfé-
rence A,. Cette grandeur est désignée par L, et est donnée
ISOIR 354, Mesure des coefficients d'absorption en salle
par la formule :
réverbéran te.
ISOIR 71 7, Évaluation de l'isolement acoustique des habi-
. . (2)
tations.
OÙ A, = 10 m2.
Publication CE1 179, Sonomètres de précision.
Publication CE1 225, Filtres de bandes d'octave, de demi-
Dans tous les cas OÙ l'on n'est pas certain que les résultats
octave et de tiers d'octave destinés à l'analyse des bruits et
sont obtenus sans transmissions latérales, le niveau de
des vibrations.
pression de bruit de choc normalisé est désigné par Lk.
1

---------------------- Page: 3 ----------------------
IS0 140/VI-1978 (F)
3.4 affaiblissement acoustique brut (amélioration de I'iso- 5 DISPOSITIONS POUR L'ESSAI
lation aux bruits de chocs) : Différence entre les niveaux
moyens de pression acoustique dans la salle de réception,
5.1 Salle de reception
avant et après l'installation, par exemple, d'un revêtement
L'installation du laboratoire doit respecter les spécifications
de sol (voir I'ISO 14O/VIII). Cette grandeur est désignée
de I'ISO 140/1.
par AL.
5.2 Éprouvette
4 APPAREILLAGE
La dimension de l'éprouvette est déterminée par la dimen-
Le bruit de choc normalisé est produit par une machine à
sion de l'ouverture d'essai du laboratoire telle que définie
chocs construite d'après les spécifications suivantes. Les
dans I'ISO 140/1, c'est-à-dire comprise entre 10 m2 et
autres appareils doivent pouvoir respecter les spécifications
20 m2, avec la plus courte longueur d'arête non inférieure
du chapitre 6.
a 2,3 m. Les dimensions de l'éprouvette de sol et des élé-
ments comprenant cette éprouvette doivent être aussi
La machine à chocs doit avoir cinq marteaux en ligne, la
proches que possible des dimensions réelles.
distance entre les marteaux extrêmes étant environ 400 mm.
NOTE - L'eprouvette devrait être installée. de preference. d'une
L'intervalle de temps entre deux chocs successifs doit
manikre aussi identique que possible à la construction réelle, avec
être 100 f 5 ms. La masse de chaque marteau doit être
une reproduction exacte des liaisons et des conditions de scellement
d
0,5 kg (à t 2,5 % près).
normales en bordure et aux joints à l'intérieur de l'éprouvette. Les
conditions de montage doivent etre précisées dans le procès-verbal
La chute d'un marteau sur un plancher plan doit produire
d'essai.
le même effet qu'une chute libre, sans frottement, de
Dans les laboratoires dans lesquels la réflexion des éléments
40 mm (à f 2,5 % près).
latéraux est supprimée, le bruit transmis par toute voie
La tête du marteau qui heurte le plancher doit être un
indirecte doit être négligeable par rapport au bruit transmis
cylindre de laiton ou d'acier, de 3 cm de diamètre, avec
par I'éprouvette.
une extrémité sphérique dont le rayon est environ 50 cm.
On peut aussi, notamment dans le cas d'un revêtement de
sol fragile, utiliser des marteaux dont la surface qui frappe
6 MODE OPÉRATOIRE ET ÉVALUATION
le plancher est recouverte d'une couche de caoutchouc dont
les dimensions, la composition et la vulcanisation sont spé-
6.1 Production du champ acoustique
cifiées ci-dessous.
Le bruit de choc doit être produit au moyen d'une machine
Un marteau avec revêtement de caoutchouc doit être iden-
à chocs (voir chapitre 4). Pour la position de la machine à
tique géométriquement à un marteau de laiton ou d'acier
chocs, voir 6.5.
sans revêtement. La partie de chaque marteau située sous
un plan de section droite, dont la distance au point le plus
6.2 Mesurage du niveau de pression du bruit de choc
bas de l'extrémité sphérique est 5 mm, doit être constituée
Le niveau de pression du bruit de choc dans la salle de
de caoutchouc répondant aux spécifications du tableau 1.
réception doit être une moyenne spatio-temporelle que l'on
TABLEAU 1 - Specifications du caoutchouc pour le revdtement
peut obtenir en utilisant un certain nombre de positions
des marteaux de la machine à chocs
fixes du microphone, ou par un mouvement continu du
Composition Parties (mlm) microphone avec intégration de p2.
L'appareil indicateur doit être conçu pour déterminer les
Caoutchouc naturel 1 O0
valeurs efficaces de la pression acoustique ou les niveaux de
Oxyde de zinc 15
pression correspondants. Si l'on utilise un sonomètre, il doit
Acide stéarique 2
être conforme à la Publication CE1 179 concernant les
Noir de carbone EPC 40
sonomètres de précision. II est recommandé d'utiliser la
réponse ((lente)). L'appareillage de mesurage complet, y
1
Phenyl Wtanaphtylamine
compris le microphone, doit être réglé avant chaque série
Disulfure de benzo-thiazyle-2,2
1.2
de mesurages pour permettre d'obtenir des valeurs absolues
Diphénylguanidine
0.4
les sonomètres
du niveau de pression acoustique. Pour
Soufre 3
étalonnés dans un champ acoustique d'ondes progressives,
une correction du champ diffus doit être appliquée. (Voir
Vulcanisation : 45 min à 142 "C (2.9 bar)
I
Publication CE1 179, chapitre 8.2.)
I
Lorsque, dans une bande de fréquences quelconque, le
Ainsi la couche de caoutchouc a une surface plane et une
niveau de pression acoustique dans la salle de réception
surface courbe, et son épaisseur maximale est 5 mm. Elle
dépasse de moins de 10 dB le niveau du bruit de fond, on
doit être collée ou vulcanisée sur le métal.
doit mesurer ce dernier juste avant et juste après le mesu-
à la source de
La distance entre les supports de la machine à chocs et la rage
...