FprEN 1793-6

SLOVENSKI STANDARD
01-november-2023
Nadomešča:
SIST EN 1793-6:2018+A1:2021
Protihrupne ovire za cestni promet - Preskusna metoda za ugotavljanje akustičnih
lastnosti - 6. del: Bistvene karakteristike - Terenske vrednosti izolirnosti pred
zvokom v zraku pri usmerjenem zvočnem polju
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
Lärmschutzvorrichtungen an Straßen - Prüfverfahren zur Bestimmung der akustischen
Eigenschaften - Teil 6: Produktspezifische Merkmale - In-situ-Werte der
Luftschalldämmung in gerichteten Schallfeldern
Dispositifs de réduction du bruit du trafic routier - Méthode d'essai pour la détermination
de la performance acoustique - Partie 6 : Caractéristiques intrinsèques - Valeurs in situ
d'isolation aux bruits aériens dans des conditions de champ acoustique di
Ta slovenski standard je istoveten z: prEN 1793-6
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.

CEN/TC 226
Date: 2023-03-31
prEN 1793-6:2023
Secretariat: AFNOR
Road traffic noise reducing devices — Test method for determining the
acoustic performance — Part 6: Intrinsic characteristics - Airborne sound
insulation under direct sound field conditions
Lärmschutzvorrichtungen an Straßen — Prüfverfahren zur Bestimmung der
akustischen Eigenschaften — Teil 6: Produktspezifische Merkmale —
Luftschalldämmung in gerichteten Schallfeldern
Dispositifs de réduction du bruit du trafic routier — Méthode d'essai pour la
détermination de la performance acoustique — Partie 6 : Caractéristiques
intrinsèques — Isolation au bruit aérien dans des conditions de champ acoustique
direct
CCMC will prepare and attach the official title page.

prEN 1793-6:2023(E)
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Symbols and abbreviations . 13
5 Sound insulation index measurements . 15
5.1 General principle . 15
5.2 Measured quantity . 15
5.3 Test arrangement . 16
5.3.1 General. 16
5.3.2 Tests on purposely built full-size samples . 16
5.3.3 Tests on installed road traffic noise reducing devices . 16
5.3.4 Non-flat, inclined or curved road traffic noise reducing devices . 17
5.4 Measuring equipment . 23
5.4.1 Components of the measuring system . 23
5.4.2 Sound source . 23
5.4.3 Test signal . 23
5.5 Data processing . 24
5.5.1 Calibration . 24
5.5.2 Sample rate and filtering. 24
5.5.3 Background noise . 25
5.5.4 Scanning technique using nine microphones . 26
5.5.5 Adrienne temporal window . 26
5.5.6 Placement of the Adrienne temporal window . 28
5.5.7 Low-frequency limit . 29
5.6 Positioning of the measuring equipment . 30
5.6.1 Selection of the measurement positions . 30
5.6.2 Post measurements . 31
5.6.3 Additional measurements . 31
5.6.4 Reflecting objects . 31
5.6.5 Safety considerations . 31
5.7 Sample surface and meteorological conditions . 32
5.7.1 Condition of the sample surface . 32
5.7.2 Wind. 32
5.7.3 Air temperature. 32
5.8 Single-number rating . 32
5.8.1 General. 32
5.8.2 Acoustic elements . 32
5.8.3 Posts . 33
5.8.4 Global . 33
6 Measurement uncertainty . 34
7 Measuring procedure . 34
prEN 1793-6:2023 (E)
8 Test report . 35
Annex A (informative)  Low-frequency limit and window width . 37
Annex B (informative) Measurement uncertainty. 42
B.1 General . 42
B.2 Measurement uncertainty based upon reproducibility data . 42
B.3 Standard deviation of repeatability and reproducibility of the sound insulation
index . 42
Annex C (normative) Template of test report on airborne sound insulation of road traffic
noise reducing devices. 45
C.1 General . 45
C.2 Test setup (example) . 47
C.3 Test object and test situation (example) . 49
C.4 Results (example) . 51
C.4.1 Part 1 – Results for ‘element’ in tabular form . 51
C.4.2 Part 2 – Results for ‘element’ in graphic form . 52
C.4.3 Part 3 – Results for ‘post’ in tabular form . 53
C.4.4 Part 4 – Results for ‘post’ in graphic form . 54
C.4.5 Part 5 – Results for global condition (average of ‘element’ and ‘post’) in tabular form . 55
C.4.6 Part 6 – Results for global condition (average of ‘element’ and ‘post’) in graphic form . 56
C.5 Uncertainty (example) . 56
Annex D (informative) Indoor measurements for product qualification. 59
D.1 General . 59
D.2 Parasitic reflections . 59
D.3 Reverberation time of the room . 59
Bibliography . 60

prEN 1793-6:2023(E)
European foreword
This document (prEN 1793-6:2023) has been prepared by Technical Committee CEN/TC 226 “Road
equipment”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1793-6:2018+A1:2021.
EN 1793-6:2023 includes the following significant technical changes with respect to EN 1793-
6:2018+A1:2021:
— The definitions from 3.1 to 3.8 have been updated to be in accordance to the last version of EN
14388.
— The scanning technique is based on a nine-microphone grid; the use of a single microphone
displaced in nine positions has been abandoned.
— The formula to calculate the global single-number rating DL used in the previous version of
SI,G
this document has been changed.
— The use of categories of single-number rating is no longer permitted.
— One value for the standard deviation of reproducibility and repeatability in each one-third
octave frequency band has been retained, in place of three values (min, max and median) as
before (see Tables B.1 and B.2).
— The example in C.5 on the declaration of the measurement uncertainty has been updated
accordingly.
EN 1793-6:2023 is part of a series and should be read in conjunction with the following:
— EN 1793-1:2023, Road traffic noise reducing devices — Test method for determining the acoustic
performance — Part 1: Intrinsic characteristics — Sound absorption under diffuse sound field
conditions;
— EN 1793-2:2023, Road traffic noise reducing devices — Test method for determining the acoustic
performance — Part 2: Intrinsic characteristics — Airborne sound insulation under diffuse sound field
conditions;
— EN 1793 3:2023, Road traffic noise reducing devices — Test method for determining the acoustic
performance — Part 3: Normalized traffic noise spectrum;
— EN 1793-4:2023, Road traffic noise reducing devices — Test method for determining the acoustic
performance — Part 4: Intrinsic
...