SIST EN ISO 140-18:2007

SLOVENSKI STANDARD
01-marec-2007
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Acoustics - Measurement of sound insulation in buildings and of building elements - Part
18: Laboratory measurement of sound generated by rainfall on building elements (ISO
140-18:2006)
Akustik - Messung der Schalldämmung in Gebäuden und von Bauteilen - Teil 18:
Messung des durch Regenfall auf Bauteile verursachten Schalls im Prüfstand (ISO 140-
18:2006)
Acoustique - Mesurage de l'isolation acoustique des immeubles et des éléments de
construction - Partie 18: Mesurage en laboratoire du bruit produit par la pluie sur les
éléments de construction (ISO 140-18:2006)
Ta slovenski standard je istoveten z: EN ISO 140-18:2006
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 140-18
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2006
ICS 91.120.20
English Version
Acoustics - Measurement of sound insulation in buildings and of
building elements - Part 18: Laboratory measurement of sound
generated by rainfall on building elements (ISO 140-18:2006)
Acoustique - Mesurage de l'isolation acoustique des Akustik - Messung der Schalldämmung in Gebäuden und
immeubles et des éléments de construction - Partie 18: von Bauteilen - Teil 18: Messung des durch Regenfall auf
Mesurage en laboratoire du bruit produit par la pluie sur les Bauteile verursachten Schalls im Prüfstand (ISO 140-
éléments de construction (ISO 140-18:2006) 18:2006)
This European Standard was approved by CEN on 14 November 2006.
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 Central Secretariat 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
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Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 140-18:2006: E
worldwide for CEN national Members.

Foreword
This document (EN ISO 140-18:2006) has been prepared by Technical Committee ISO/TC 43
"Acoustics" in collaboration with 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 May 2007, and conflicting national standards
shall be withdrawn at the latest by May 2007.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
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 and United Kingdom.

Endorsement notice
The text of ISO 140-18:2006 has been approved by CEN as EN ISO 140-18:2006 without any
modifications.
INTERNATIONAL ISO
STANDARD 140-18
First edition
2006-11-15
Acoustics — Measurement of sound
insulation in buildings and of building
elements —
Part 18:
Laboratory measurement of sound
generated by rainfall on building
elements
Acoustique — Mesurage de l'isolement acoustique des immeubles et
des éléments de construction —
Partie 18: Mesurage en laboratoire des bruits produit par la pluie sur les
éléments de construction
Reference number
ISO 140-18:2006(E)
©
ISO 2006
ISO 140-18:2006(E)
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ii © ISO 2006 – All rights reserved

ISO 140-18:2006(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 2
4 Equipment . 3
5 Test arrangement. 3
6 Classification of rain types . 4
7 Test equipment and procedure . 4
8 Expression of results . 9
9 Measurement uncertainty . 9
10 Test report . 10
Annex A (informative) Example of a tank with perforated base . 11
Annex B (informative) Reference test specimens. 14
Bibliography . 16

ISO 140-18:2006(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 140-18 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 2, Buildings
acoustics.
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 for 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 façade elements and façades
— 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 11: Laboratory measurements of the reduction of transmitted impact sound by floor coverings on
lightweight reference floors
— Part 13: Guidelines (Technical Report)
— Part 14: Guidelines for special situations in the field
— Part 16: Laboratory measurement of the sound reduction index improvement by additional lining
— Part 18: Laboratory measurement of sound generated by rainfall on building elements
iv © ISO 2006 – All rights reserved

ISO 140-18:2006(E)
Introduction
This part of ISO 140 prescribes a laboratory method for the measurement of sound generated by rainfall on
building elements using artificial raindrops produced by a water tank.
Ideally, one should expose the test specimen to real rain for such measurements. But real rain is neither
steady nor continuous with respect to time. Furthermore, raindrops can vary in diameter due to several factors,
including geographic location, which will introduce variability in measured values. One can, however, use real
raindrops as a means of validation of measured results obtained with artificial raindrops by building a test
room in an unobstructed location. For such research, it is important that the rain sensor or rain gauge is
capable of measuring constant short interval rainfall rates. In the absence of drop size information,
repeatability and fluctuations of the measured sound levels with real rain can be investigated by undertaking
measurements separated by a time interval of at least 24 h.
Artificial raindrop generation systems, other than the water tank used in this part of ISO 140, exist, such as
hydraulic spray nozzles; however, so far, nozzles corresponding to the specifications given in this part of
ISO 140 are not commercially available: indeed, their flow rate is too high when the drop diameter is correct or
the drop diameter is too small when the flow rate is correct. As a result, only the water tank solution is
proposed in this part of ISO 140.
An alternative to real rain or artificial raindrops is the dry mechanical excitation of the test specimen.
Researchers have used different methods, such as excitation by an impact hammer and other mechanical
impacting simulators, with an aim to simulate the noise of real rain. Such methods invariably suffer from the
drawback that the noise source does not generate both the sound levels and the sound spectra that compare
well with corresponding values generated by the real rain on various types of test specimens. Further
research work is encouraged to develop mechanical methods of rain noise generation that can match both the
sound levels and spectra of real rain.

INTERNATIONAL STANDARD ISO 140-18:2006(E)

Acoustics — Measurement of sound insulation in buildings and
of building elements —
Part 18:
Laboratory measurement of sound generated by rainfall on
building elements
1 Scope
This part of ISO 140 specifies a laboratory method of measurem
...