BS EN 1793-4:2015 - Road traffic noise reducing devices. Test method for determining the acoustic performance. Intrinsic characteristics. In situ values of sound diffraction

BS EN 1793-4:2015

Road traffic noise reducing devices. Test method for determining the acoustic performance. Intrinsic characteristics. In situ values of sound diffraction

Status : Current   Published : March 2015

Format
PDF

Format
HARDCOPY



This European Standard describes a test method for determining the intrinsic characteristics of sound diffraction of added devices installed on the top of traffic noise reducing devices. The test method prescribes measurements of the sound pressure level at several reference points near the top edge of a noise reducing device with and without the added device installed on its top. The effectiveness of the added device is calculated as the difference between the measured values with and without the added devices, correcting for any change in height (the method described gives the acoustic benefit over a simple barrier of the same height; however, in practice the added device can raise the height and this could provide additional screening depending on the source and receiver positions). The test method is intended for the following applications: • preliminary qualification, outdoors or indoors, of added devices to be installed on noise reducing devices; • determination of sound diffraction index difference of added 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 added devices (with a repeated application of the method); • interactive design process of new products, including the formulation of installation manuals. The test method can be applied both in situ and on samples purposely built to be tested using the method described here. 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 the restricted frequency range and the reasons of the restriction(s) shall be clearly reported. A single-number rating is calculated from frequency data. For indoors measurements see Annex A.




Standard NumberBS EN 1793-4:2015
TitleRoad traffic noise reducing devices. Test method for determining the acoustic performance. Intrinsic characteristics. In situ values of sound diffraction
StatusCurrent
Publication Date31 March 2015
Normative References(Required to achieve compliance to this standard)EN 1793-3, EN 1793-6, EN 61672-1, EN ISO 354, ISO 354, ISO/IEC Guide 98
Informative References(Provided for Information)EN 1793-1, CEN/TS 1793-5, IEC 60942, IEC 61260
International RelationshipsEN 1793-4:2015
Draft Superseded By14/30298593 DC
DescriptorsAcoustic measurement, Road vehicles, Road transport, Noise control (acoustic), Noise control devices, Acoustic absorption, Acoustic testing, Laboratory testing, Mathematical calculations, Classification systems, Grades (quality)
ICS17.140.30
93.080.30
Title in FrenchDispositifs de réduction du bruit du trafic routier. Méthode d'essai pour la détermination des performances acoustiques. Caractéristiques intrinsèques. Valeurs in-situ de la diffraction acoustique
Title in GermanLärmschutzvorrichtungen an Straßen. Prüfverfahren zur Bestimmung der akustischen Eigenschaften. Produktspezifische Merkmale. In-situ-Werte der Schallbeugung
CommitteeB/509/6
ISBN978 0 580 86099 7
PublisherBSI
FormatA4
DeliveryYes
Pages38
File Size3.105 MB
Price£214.00


 Your basket
Your basket is empty

Multi-user access to over 3,500 medical device standards, regulations, expert commentaries and other documents


Collaborate, Innovate, Accelerate.


BSOL

The faster, easier way to work with standards


Tracked Changes

Understand the changes made to a standard with our new Tracked Changes version