| Budget Amount *help |
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2011: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2010: ¥13,130,000 (Direct Cost: ¥10,100,000、Indirect Cost: ¥3,030,000)
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| Research Abstract |
Electric vehicles (EV) and hybrid electric vehicles (HEV) are quieter than conventional internal combustion engine vehicles (ICEV). It has been concerned that the reduced noise might lead dangerous situations for pedestrians. Hence, the use of warning sounds, which are radiated by the vehicle to alert pedestrians, has been discussed in some governments. To design the sound itself or to develop the regulation concerning the sound, it is much important to know the feasible sound level of the warning sounds compared to the background sounds. Aim of this study is to reveal the effect of age on feasible sound level of warning sounds. The feasible level of five possible warning sounds was examined in three different urban environmental sounds in a laboratory. Moreover, a questionnaire survey on the sound of quiet vehicles to accumulate knowledge such as social demands and feasible acoustic properties for the acoustic information.
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