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전기자동차 소리발생 관련 국제기준개발 동향 및 음압레벨 연구
박진우(Jinwoo Park),이균석(Kyunseok Lee),배중호(Jungho Bae),권해붕(Heaboung Kwon) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
The environmental benefits achieved by electric and hybrid electric road transport vehicles(EV/HEV) reduced fossil fuel demands and very quiet vehicle operation at low speeds. EV and HEV have the advantage of being more environmentally friendly and quieter than internal combustion engine vehicles. But reduced noise can also lead to potentially dangerous situations for pedestrians when an oncoming vehicle is inaudible due to background noise and low sound level of vehicles. So the installation of a device to provide sound as loud as the conventional vehicles has been discussed as a counter action against the quietness problem. Measures to deal with the quietness problem are currently being discussed by many governments. As an international agreement of these actions, a special informal group called "Quiet Road Transport Vehicles(QRTV)" was established in 2010 to deal with this problem within the Working Party on Noise(GRB), a subsidiary body of the UN/ECE/WP29. The system is called the Acoustic Vehicle Alerting System(AVAS). So external acoustic warning system should be provided to the vehicle. The system should automatically emit a sound when the vehicle is driven at a speed of less than 20km/h; the sound should be a continuous sound that evokes the running condition of a vehicle. We tested EV and ICEV and this system according to the GRB guidelines, the sound level is not exceed approximately 60dB at a 2m distance from the center of the vehicle.