Title
The barrier effect of roadside diffracting elements for standard noise calculations
Author
van der Eerden, F.J.M.
Brouns, E.
Eisses, A.R.
van Vliet, W.
Publication year
2019
Abstract
By using elements with quarter-wavelength resonators of different depths alongside a road, noise can be diffracted upwards to create a zone of noise reduction behind these elements. Measurements at a short distance, up to 15 meters, have proven that a noise reduction up to 4 dB(A) can be achieved. The noise reduction at long distance, up to 600 meters, was calculated numerically by combining a finite element model (FEM) and a parabolic equation model (PE), taking a downwind condition into account. These results are used to design an engineering approach that represents a barrier effect. This approach can be implemented in the standard noise calculation models, such as the Dutch national model or the ISO 9613-2 standard. The steps that are used for this engineering approach are explained. This involves the measurement of the intrinsic characteristics of the diffracting elements and empirical relations that use these characteristics. © INTER-NOISE 2019 MADRID - 48th International Congress and Exhibition on Noise Control Engineering. All Rights Reserved.
To reference this document use:
http://resolver.tudelft.nl/uuid:0ecc22f1-5e96-4610-af9b-314b53249543
TNO identifier
876023
Publisher
SOCIEDAD ESPANOLA DE ACUSTICA - Spanish Acoustical Society, SEA
ISBN
9781613996690
Source
INTER-NOISE 2019 MADRID - 48th International Congress and Exhibition on Noise Control Engineering, 48th International Congress and Exhibition on Noise Control Engineering, INTER-NOISE 2019 MADRID, 16 June 2019 through 19 June 2019
Document type
conference paper