Relating the near field noise of passenger cars with the driving behavior

• Autores: David Ibarra, Pedro Cobo Parra, Jose Antonio Calvo Ramos, José Luis San Román García
• Localización: Noise Control Engineering Journal, ISSN 0736-2501, Vol. 60, Nº. 2, 2012, págs. 171-183
• Idioma: inglés
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• Resumen

  • Road traffic noise amounts to roughly half of the overall ambient noise. Usual emission (vehicle emission limits) and immission (barriers, sound-reducing windows) noise control techniques have not been enough to decrease significantly the annoyance by road traffic over the last three decades. The positive effect of these control techniques has been counteracted by the increase of traffic density. Moreover, the traffic noise annoyance is highly correlated with the maximum noise levels usually produced by aggressive drivers. However, current traffic noise measurement systems are based upon an overall assessment, so that they are unable to discriminate between quiet and noisy drivers. Therefore, a near field noise measuring system is proposed in this paper that is able to measure the contribution of each vehicle to the road traffic noise, allowing the detection of noisy drivers. The system is based on two onboard microphones, one for the engine noise and other for the rolling noise. Experimental results are provided that demonstrate the performance of the proposed system on five drivers, along suburban and urban courses of a large city, with petrol and diesel vehicles. The analysis of concurrent acoustical and driving condition data reveals that the system is capable of discriminating clearly those vehicles generating the maximum noise levels