VESS (Virtual Engine Sound System) / AVAS (Acoustic Vehicle Alerting System)

Automobiles that operate with electric motors – electric vehicle (EV), hybrid EV (HEV), plug-in hybrid EV (PHEV), etc – do not generate noticeable sound when driving in low speed. which exposes pedestrians at risk of accidents. VESS, or AVAS generates artificial engine sound to alert pedestrians of incoming electric vehicles and prevent accidents.