Memorias de investigación
Communications at congresses:
Extrapolation of maximum noise levels from near-field measurements to far-field positions
Year:2012

Research Areas
  • Mechanical aeronautics and naval engineering

Information
Abstract
The goal of this work is to propose a new strategy for the attenuation of the traffic noise, which constitutes one of the main sources of acoustic pollution in urban and suburban areas. This strategy is based on the measurement of the noise radiated by each individual vehicle using an electro-acoustic system, composed of two microphones for the acquisition of the engine and of the rolling noise. These microphones have been situated inside the engine hood and close to the right back tire respectively. The signals have been recorded for diesel and petrol engines and through typical urban and suburban courses with different persons. Using this procedure, we aim to characterise the drivers responsible of the highest noise levels producing maximum annoyance. The near-field measurements have been then extrapolated to far field positions using an analytical filter that takes into account absorbing properties of the propagation floor. For the internal signal it has been necessary to characterise the acoustic properties of the engine hood experimentally using an array of microphones surrounding the vehicle. The propagated noise is calculated considering the absorption due to the geometrical divergence, the absorption by the air, and the effect of the propagating surface. The signals extrapolated to the receiver position could be compared with the current normative to propose recommendations concerning noise control actions.
International
Si
Congress
INTER-NOISE 2012/ ASME NCAD meeting
960
Place
New York, USA
Reviewers
Si
ISBN/ISSN
0736-2935
Start Date
19/08/2012
End Date
23/08/2012
From page
1
To page
12
Proceedings of Inter Noise 2012
Participants

Research Group, Departaments and Institutes related
  • Creador: Departamento: Física e Instalaciones Aplicadas a la Edificación, al Medio Ambiente y al Urbanismo