Italian leader in postal services and in mail delivery is a public utility with an extensive presence throughout Italy, consisting in a network of about 14,000 post offices, over 46,000 postmen and over 40,000 vehicles. As concerns environment protection, it is necessary to pursue the aim of reducing noise pollution; for this purpose, limit values for sound level must be respected; subsequent reductions in limit values and changes in testing procedure may be decided on the basis of available technological potential and analysis of cost/benefit ratios, in order to permit production of vehicles able to meet more stringent limits. Present paper gives a contribution to noise control, showing results of a comparison between a traditional two wheel motorcycle and an electric four wheel motor vehicle, as concerns acoustic performance. Sound pressure level and SEL produced by tested vehicles, belonging to mail delivery service, were measured in different test conditions according to standards. The effects of road surface and slope, together with exhaust system noise emissions, were particularly taken into account. Finally an assessment of noise mitigation granted by electric motor was carried out.
Noise Analysis of Postal Fleet: a Comparison between Motorcycles and Electric Vehicles
COTANA, Franco;NICOLINI, ANDREA;GORETTI, MICHELE
2009
Abstract
Italian leader in postal services and in mail delivery is a public utility with an extensive presence throughout Italy, consisting in a network of about 14,000 post offices, over 46,000 postmen and over 40,000 vehicles. As concerns environment protection, it is necessary to pursue the aim of reducing noise pollution; for this purpose, limit values for sound level must be respected; subsequent reductions in limit values and changes in testing procedure may be decided on the basis of available technological potential and analysis of cost/benefit ratios, in order to permit production of vehicles able to meet more stringent limits. Present paper gives a contribution to noise control, showing results of a comparison between a traditional two wheel motorcycle and an electric four wheel motor vehicle, as concerns acoustic performance. Sound pressure level and SEL produced by tested vehicles, belonging to mail delivery service, were measured in different test conditions according to standards. The effects of road surface and slope, together with exhaust system noise emissions, were particularly taken into account. Finally an assessment of noise mitigation granted by electric motor was carried out.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
