Abstract

In this paper, reduction of road traffic noise was investigated quantitatively, if low-noise vehicles such as electric ones were used widely. First of all, noise radiated from a single electric car travelling with an equal and constant speed was measured in order to determine sound power level of low-noise car accurately. Secondly a calculation method of sound power level generated from various kind of trucks was proposed, where trucks coast on a road. Finally reduction of road traffic noise was quantitatively determined according to several scenarios. We can guess not only low-noise vehicles but also diesel trucks will be driven on a road.

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