EN 1793-5:2016
(Main)Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 5: Intrinsic characteristics - In situ values of sound reflection under direct sound field conditions
Road traffic noise reducing devices - Test method for determining the acoustic performance - Part 5: Intrinsic characteristics - In situ values of sound reflection under direct sound field conditions
This European Standard describes a test method for measuring a quantity representative of the intrinsic characteristics of sound reflection from road noise reducing devices: the reflection index.
The test method is intended for the following applications:
- determination of the intrinsic characteristics of sound reflection of noise reducing devices to be installed along roads, to be measured either on typical installations alongside roads or on a relevant sample section;
- determination of the in situ intrinsic characteristics of sound reflection of noise reducing devices in actual use;
- comparison of design specifications with actual performance data after the completion of the construction work;
- verification of the long-term performance of noise reducing devices (with a repeated application of the method).
The test method is not intended for the following applications:
- determination of the intrinsic characteristics of sound reflection of noise reducing devices to be installed in reverberant conditions, e.g. inside tunnels or deep trenches.
Results are expressed as a function of frequency, in one-third octave bands between 100 Hz and 5 kHz. If it is not possible to get valid measurements results over the whole frequency range indicated, the results shall be given in a restricted frequency range and the reasons of the restriction(s) shall be clearly reported.
Lärmschutzvorrichtungen an Straßen - Prüfverfahren zur Bestimmung der akustischen Eigenschaften - Teil 5: Produktspezifische Merkmale - In-situ-Werte der Schallreflexion in gerichteten Schallfeldern
Dispositifs de réduction du bruit du trafic routier - Méthode d'essai pour la détermination de la performance acoustique - Partie 5: Caractéristiques intrinsèques - Valeurs in situ de réflexion acoustique dans des conditions de champ acoustique direct
Protihrupne ovire za cestni promet - Preskusna metoda za ugotavljanje akustičnih lastnosti - 5. del: Bistvene lastnosti - Terenske vrednosti odboja zvoka z uporabo usmerjenega zvočnega polja
Ta dokument opisuje preskusno metodo za merjenje količine, ki predstavlja bistvene lastnosti na področju odboja zvoka od protihrupnih ovir za cestni promet: indeks odboja.
Preskusna metoda je namenjena:
– ugotavljanju bistvenih lastnosti na področju odboja zvoka od obcestnih protihrupnih ovir, ki se merijo na običajnih mestih namestitve ob cesti ali na ustreznem vzorčnem delu;
– ugotavljanju bistvenih lastnosti na področju odboja zvoka od protihrupnih ovir med dejansko uporabo na mestu uporabe;
– primerjavi specifikacij zasnove s podatki o dejanskih lastnostih po koncu izgradnje;
– preverjanje dolgoročnih lastnosti protihrupnih ovir (z večkratno izvedbo metode).
Preskusna metoda ni namenjena:
– ugotavljanju bistvenih lastnostih za odboj zvoka od protihrupnih naprav za namestitev v odmevnih pogojih, npr. v predorih.
Rezultati so izraženi kot funkcija frekvence v tretjinskih oktavnih pasovih med 100 Hz in 5 kHz. Če ni mogoče dobiti veljavnih rezultatov meritev za celo opredeljeno frekvenčno območje, se rezultati navedejo za omejeno frekvenčno območje, razlogi za omejitev območja pa se jasno opredelijo.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2016
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SIST-TS CEN/TS 1793-5:2004
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ODVWQRVWLGHO %LVWYHQHODVWQRVWL7HUHQVNHYUHGQRVWLRGERMD]YRND]XSRUDER
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Road traffic noise reducing devices - Test method for determining the acoustic
performance - Part 5: Intrinsic characteristics - In situ values of sound reflection under
direct sound field conditions
Lärmschutzvorrichtungen an Straßen - Prüfverfahren zur Bestimmung der akustischen
Eigenschaften - Teil 5: Produktspezifische Merkmale - In-situ-Werte der Schallreflexion
in gerichteten Schallfeldern
Dispositifs de réduction du bruit du trafic routier - Méthode d'essai pour la détermination
de la performance acoustique - Partie 5: Caractéristiques intrinsèques - Valeurs in situ
de réflexion acoustique dans des conditions de champ acoustique direct
Ta slovenski standard je istoveten z: EN 1793-5:2016
ICS:
17.140.30 Emisija hrupa transportnih Noise emitted by means of
sredstev transport
93.080.30 Cestna oprema in pomožne Road equipment and
naprave installations
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 1793-5
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2016
EUROPÄISCHE NORM
ICS 17.140.30; 93.080.30 Supersedes CEN/TS 1793-5:2003
English Version
Road traffic noise reducing devices - Test method for
determining the acoustic performance - Part 5: Intrinsic
characteristics - In situ values of sound reflection under
direct sound field conditions
Dispositifs de réduction du bruit du trafic routier - Lärmschutzvorrichtungen an Straßen - Prüfverfahren
Méthode d'essai pour la détermination de la zur Bestimmung der akustischen Eigenschaften - Teil
performance acoustique - Partie 5: Caractéristiques 5: Produktspezifische Merkmale - In-situ-Werte der
intrinsèques - Valeurs in situ de réflexion acoustique Schallreflexion in gerichteten Schallfeldern
dans des conditions de champ acoustique direct
This European Standard was approved by CEN on 23 January 2016.
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, Former Yugoslav Republic of Macedonia, 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
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1793-5:2016 E
worldwide for CEN national Members.
Contents
European foreword . 4
Introduction . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Symbols and abbreviations . 13
5 Sound reflection index measurements . 15
5.1 General principle . 15
5.2 Measured quantity . 15
5.3 Test arrangement . 18
5.4 Measuring equipment . 23
5.4.1 Components of the measuring system . 23
5.4.2 Sound source . 24
5.4.3 Test signal . 24
5.5 Data processing . 25
5.5.1 Calibration . 25
5.5.2 Sample rate . 26
5.5.3 Background noise . 27
5.5.4 Signal subtraction technique . 27
5.5.5 Adrienne temporal window . 30
5.5.6 Placement of the Adrienne temporal window . 32
5.5.7 Low frequency limit and sample size . 33
5.6 Positioning of the measuring equipment . 35
5.6.1 Maximum sampled area. 35
5.6.2 Selection of the measurement positions. 35
5.6.3 Reflecting objects . 42
5.6.4 Safety considerations. 42
5.7 Sample surface and meteorological conditions . 42
5.7.1 Condition of the sample surface . 42
5.7.2 Wind . 42
5.7.3 Air temperature . 42
5.8 Single-number rating of sound reflection DL . 42
RI
5.9 Measurement uncertainty . 43
5.10 Measuring procedure . 43
5.11 Test report . 44
Annex A (informative) Measurement uncertainty . 46
A.1 General . 46
A.2 Measurement uncertainty based upon reproducibility data . 46
A.3 Standard deviation of repeatability and reproducibility of the sound reflection index . 46
Annex B (informative) Template of test report on sound reflection of road noise barriers . 48
B.1 Overview . 48
B.2 Test setup (example) . 50
B.3 Test object and test situation (example) . 51
B.4 Test Results (example) . 53
B.4.1 Part 1 – Results in tabular form . 53
B.4.2 Part 2 – Results in graphic form. 54
B.5 Uncertainty (example) . 54
Annex C (informative) Near field to far field relationship . 56
Bibliography . 57
European foreword
This document (EN 1793-5:2016) has been prepared under the direction of Technical Committee
CEN/TC 226 “Road equipment”, by Working Group 6 “Anti-noise devices”, the secretariat of which is held by
AFNOR.
This document supersedes CEN/TS 1793-5:2003.
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 September 2016, and conflicting national standards shall be
withdrawn at the latest by September 2016.
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.
With respect to the superseded document, the following changes have been done:
— the rotating loudspeaker/microphone assembly has been replaced by a loudspeaker and a 9-
microphone square array (the measurement grid);
— the definition of RI has been changed;
— the geometrical divergence correction factor has been changed;
— a new correction factor for sound source directivity has been introduced;
— a new correction factor for gain mismatch has been introduced;
— the impulse response alignment for signal subtraction has been described in more detail;
— the lowest reliable one-third frequency band has been better defined;
— the way to evaluate the uncertainty of the measurement method from reproducibility data has been
introduced (Annex A);
— a detailed example is given (Annex B);
— information on the near-field to far-field relationship has been added (Annex C).
It should be read in conjunction with:
EN 1793-1, Road traffic noise reducing devices - Test method for determining the acoustic performance –
Part 1: Intrinsic characteristics of sound absorption under diffuse sound field conditions
EN 1793-2, Road traffic noise reducing devices - Test method for determining the acoustic performance –
Part 2: Intrinsic characteristics of airborne sound insulation under diffuse sound field conditions
EN 1793-3, Road traffic noise reducing devices - Test method for determining the acoustic performance –
Part 3: Normalized traffic noise spectrum
EN 1793-4, Road traffic noise reducing devices - Test method for determining the acoustic performance – Part
4: Intrinsic characteristics – In situ values of sound diffraction
EN 1793-6, Road traffic noise reducing devices - Test method for determining the acoustic performance – Part
6: Intrinsic characteristics – In situ values of airborne sound insulation under direct sound field conditions
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this Eu
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