Abstract
Growing demand on transportation, road and railway networks has increased the risk of annoyance from these sources and the need to optimise noise mitigation. The potential traffic noise reduction arising from use of acoustically-soft surfaces and artificial roughness (0.3 m high or less) is explored through laboratory experiments, outdoor measurements at short and medium ranges and predictions. Although the applicability of ground treatments depends on the space usable for the noise abatement and the receiver position, replacing acousticallyhard ground by acoustically-soft ground without or with crops and introducing artificial roughness configurations could achieve noise reduction along surface transport corridors without breaking line of sight between source and receiver, thereby proving useful alternatives to noise barriers. A particularly successful roughness design has the form of a square lattice which is found to offer a similar insertion loss to regularly-spaced parallel wall arrays of the same height but twice the width. The lattice design has less dependence on azimuthal source-receiver angle than parallel wall configurations.
References
[1] ISO, Acoustics–Attenuation of Sound During Propagation Outdoors–Part 2: A General Method of Calculation (ISO 9613-2). (ISO, Geneva, Switzerland, 1996) Search in Google Scholar
[2] K. Attenborough, K. M. Li, K. Horoshenkov, Predicting Outdoor Sound, Taylor and Francis, London, 2007 10.1201/9781482295023Search in Google Scholar
[3] Annex to Commission Directive 2015/996 inOflcial Journal of the European Union L168 (2015) Search in Google Scholar
[4] R. Nota, R. Barelds, D. Van Maercke, Harmonoise WP 3 Engineering method for road traflc and railway noise after validation and fine tuning, Deliverable of WP3 of the HARMONOISE project. Document ID HAR32TR-040922-DGMR20, 2005 Search in Google Scholar
[5] NORD2000. Comprehensive outdoor sound propagation model. Part 1. Propagation in an atmosphere without significant refraction. Report AV 1849/00 Delta Acoustics http:// www.madebydelta.com/imported/images/DELTA_Web/docume nts/TC/acoustics/Nord2000/av185100rev_Nord2000_Propagat ion_Model2.pdf (date last viewed 11/01/16) (2006) Search in Google Scholar
[6] S. Taherzadeh, K. Attenborough, Deduction of ground impedance from measurements of excess attenuation spectra. J. Acoust. Soc. Am. 1999, 105 2039–2042 10.1121/1.426744Search in Google Scholar
[7] ANSI/ASA S1.18-2010. American National Standard Method for Determining the Acoustic Impedance of Ground Surfaces (revision of S1.18-1998) Search in Google Scholar
[8] NORDTEST ACOU 104. Ground Surfaces: determination of acoustic impedance, 1998. http://doutoramento.schiu.com/referen cias/outras/NT%20ACOU%2014%20-%20Ground%20Surfaces %20Determination%20of%20acoustic%20impedance.%20199 9.pdf (date last viewed 2/01/16) Search in Google Scholar
[9] M. Delany, E. N. Bazley, Acoustical properties of fibrous absorbent materials, Appl. Acoust. 1970, 3, 105–116 10.1016/0003-682X(70)90031-9Search in Google Scholar
[10] K. Attenborough, I. Bashir, S. Taherzadeh, Outdoor ground impedance models, J. Acoust. Soc. Am. 2011, 129, 2806–2819 10.1121/1.3569740Search in Google Scholar PubMed
[11] D. Dragna, K. Attenborough, P. Blanc-Benon, On the inadvisability of using single parameter models for representing the acoustical properties of ground surfaces, J. Acoust. Soc. Am. 2015, 138, 2399–2413, dx.doi.org/10.1121/1.4931447 10.1121/1.4931447Search in Google Scholar PubMed
[12] H. Taraldsen, G. Jonasson, Aspects of ground effect modeling, J. Acoust. Soc. Am. 2011, 129, 47–53 10.1121/1.3500694Search in Google Scholar PubMed
[13] D. Dragna, P. Blanc-Benon, Physically admissible impedance models for time-domain computations of outdoor sound propagation, Acta Acust. united Ac. 2014, 100, 401–410 10.3813/AAA.918719Search in Google Scholar
[14] Road noise prediction,2 -Noise propagation computation method including meteorological effects (NMPB 2008), SETRA (2009) downloaded from http://www.setra.developpementdurable. gouv.fr/ (last viewed 02/01/16) Search in Google Scholar
[15] G. Guillaume, F. Faure, B. Gauvreau, F. Junker, M. Berengier, Estimation of impedance model input parameter from in situ measurements: Principles and applications, Appl. Acoust. 2015, 95, 27–36 10.1016/j.apacoust.2015.01.024Search in Google Scholar
[16] J. S. Robertson, P. J. Schlatter, W. L. Siegmann, Sound propagation over impedance discontinuities with the parabolic approximation, J. Acoust. Soc. Am. 1996, 99, 761–767 10.1121/1.414653Search in Google Scholar
[17] D. C. Hothersall, J. N. B. Harriott, Approximate models for sound propagation abovemulti-impedance plane boundaries, J. Acoust. Soc. Am. 1995, 97, 918–926 10.1121/1.412136Search in Google Scholar
[18] K. B. Rasmussen, Propagation of road traflc noise over level terrain, J. Sound Vib. 1982, 82, 51–61 10.1016/0022-460X(82)90542-9Search in Google Scholar
[19] M. Naghieh, S. I. Hayek, Diffraction of a point source by two impedance covered half-planes, J. Acoust. Soc. Am. 1981, 69, 629–637 10.1121/1.385579Search in Google Scholar
[20] B. O. Enflo, P. H. Enflo, Sound wave propagation from a point source over a homogeneous surface and over a surface with an impedance discontinuity, J. Acoust. Soc. Am. 1987, 82, 2123– 2134 10.1121/1.395657Search in Google Scholar
[21] B. A. de Jong, A. Moerkerken, J. D. van der Toorn, Propagation of sound over grassland and over an earth barrier, Journal of Sound and Vibration 1983, 86, 23–46 10.1016/0022-460X(83)90941-0Search in Google Scholar
[22] G. A. Daigle, J. Nicolas, J. L. Berry, Propagation of noise above ground having an impedance discontinuity, J. Acoust. Soc. Am. 1985, 77, 127–138 10.1121/1.392276Search in Google Scholar
[23] P. Boulanger, T. Waters-Fuller, K. Attenborough, K. M. Li, Models and measurements of sound propagation from a point source over mixed impedance ground, J. Acoust. Soc. Am. 1997, 102, 1432–1442 10.1121/1.420101Search in Google Scholar
[24] Y.W. Lam, M. R. Monazzam, On the modeling of sound propagation over multi-impedance discontinuities using a semiempirical diffraction formulation, J. Acoust. Soc. Am. 2006, 120, 686–698 10.1121/1.2216905Search in Google Scholar
[25] I. Bashir, Acoustical exploitation of rough, mixed impedance and porous surfaces outdoors, PhD Thesis, Engineering and Innovation, The Open University, 2014 Search in Google Scholar
[26] (a) D. Aylor, Noise reduction by vegetation and ground, J. Acoust. Soc. Am. 1972, 51, 197–205 (b) D. Aylor, Sound Transmission through Vegetation in Relation to Leaf Area Density, Leaf Width, and Breadth of Canopy, J. Acoust. Soc. Am. 1972, 51, 411– 418 10.1121/1.1912852Search in Google Scholar
[27] I. Bashir, S. Taherzadeh, H.-C. Shin, K. Attenborough, Sound propagation over soft ground with and without crops and potential for surface transport noise reduction, J. Acoust. Soc. Am. 2015, 137, 154–164, http://dx.doi.org/10.1121/1.4904502 10.1121/1.4904502Search in Google Scholar PubMed
[28] P. Boulanger, K. Attenborough, S. Taherzadeh, T. Waters-Fuller, K. M. Li, Ground Effect Over Hard Rough Surfaces, J. Acoust. Soc. Am. 1998, 104, 1474–1482 10.1121/1.424358Search in Google Scholar
[29] K. Attenborough, T.Waters-Fuller, Effective impedance of rough porous ground surfaces, J. Acoust. Soc. Am. 2000, 108, 949–956 10.1121/1.1288940Search in Google Scholar
[30] J. P. Chambers, J. M. Sabatier, R. Raspet, Grazing incidence propagation over a soft rough surface, J. Acoust. Soc. Am. 1997, 102, 55–59 10.1121/1.419728Search in Google Scholar
[31] A. Whelan, J. P. Chambers, A note on the effects of roughness on acoustic propagation past curved rough surfaces, J. Acoust. Soc. Am. 2009, 125, EL231–EL235 10.1121/1.3129223Search in Google Scholar
[32] P. Boulanger, K. Attenborough, Q. Qin, Effective impedance of surfaces with porous roughness: Models and data, J. Acoustic. Soc. Am. 2004, 117, 1146–1156 10.1121/1.1850211Search in Google Scholar
[33] I. Tolstoy, Coherent sound scatter from a rough interface between arbitrary fluids with particular reference to roughness element shapes and corrugated surfaces, J. Acoust. Soc. Am. 1982, 72, 960–972 10.1121/1.388177Search in Google Scholar
[34] I. Tolstoy, Smoothed boundary conditions, coherent lowfrequency scatter, and boundary modes, J. Acoust. Soc. Am. 1983, 72, 1–22 10.1121/1.390395Search in Google Scholar
[35] R. J. Lucas, V. Twersky, Coherent response to a point source irradiating a rough plane, J. Acoust. Soc. Am. 1984, 76, 1847–1863 10.1121/1.391485Search in Google Scholar
[36] L. A. M. van der Heijden, M. J.MMartens, Traflc noise reduction by means of surface wave exclusion above parallel grooves in the roadside, Applied Acoustics 1982, 15, 329–339 10.1016/0003-682X(82)90021-4Search in Google Scholar
[37] H. Bougdah, I. Ekici, J. Kang, A laboratory investigation of noise reduction by rib-like structures on the ground, J. Acoust. Soc. Am. 2006, 120, 3714–3722 10.1121/1.2372594Search in Google Scholar PubMed
[38] I. Bashir, S. Taherzadeh, K. Attenborough, Diffraction-assisted rough ground effect: models and data, J. Acoust. Soc. Am. 2013, 133, 1281–1292 10.1121/1.4776200Search in Google Scholar PubMed
[39] I. Bashir, S. Taherzadeh, K. Attenborough, Surface waves over periodically spaced strips, J. Acoust. Soc. Am. 2013, 134, 4691– 4697 10.1121/1.4824846Search in Google Scholar
[40] G. A. Daigle, M. R. Stinson, D. I. Havelock, Experiments on surface waves over a model impedance plane using acoustical pulses, J. Acoust. Soc. Am. 1996, 99, 1993–2005 10.1121/1.415386Search in Google Scholar
[41] W. Zhu, M. Stinson, G. A. Daigle, Scattering from impedance gratings and surface wave formation, J. Acoust. Soc. Am. 2002, 111, 1996–2012 10.1121/1.1468879Search in Google Scholar
[42] W. Zhu, G. A. Daigle, M. Stinson, Experimental and numerical study of air-coupled surface waves generated above strips of finite impedance, J. Acoust. Soc. Am. 2003, 114, 1243–1253 10.1121/1.1603764Search in Google Scholar
[43] J. P. Chambers, J. M. Sabatier, Recent advances in utilizing acoustics to study surface roughness in agricultural surfaces, Applied Acoustics 2002, 63, 795–812 10.1016/S0003-682X(01)00057-3Search in Google Scholar
[44] S. Taherzadeh, I. Bashir, T. Hill, K. Attenborough, M. Hornikx, Reduction of surface transport noise by ground roughness, Applied Acoustics 2014, 83, 1–15, DOI: 10.1016/j.apacoust.2014.03.011 10.1016/j.apacoust.2014.03.011Search in Google Scholar
[45] T van Renterghem, J Forssen, K Attenborough, P Jean, J Defrance, M Hornikx, J Kang, Using natural means to reduce surface transport noise during propagation outdoors, Applied Acoustics 2015, 92, 86–101, DOI: 10.1016/j.apacoust.2015.01.004 10.1016/j.apacoust.2015.01.004Search in Google Scholar
[46] Environmental Methods for Transport Noise Reduction ed Nilsson et al., Cat/ISBN: Y119572 / 9780415675239 CRC Press an imprint of Taylor and Francis New York, 2014 Search in Google Scholar
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