How many decibels is car noise?

How many decibels is automobile noise? Car noise in the car below 60 dB, 40 to 60 dB belongs to people's normal conversation sound, according to GB14952002 in the provisions of the car (M1 class vehicles) outside the car noise limit of 74dB decibels, there is no mandatory sedan car noise standards. Vehicle engine is a source of noise, its noise generation is different with the engine speed (mainly through: front fender, hood, firewall, exhaust pipe generation and transmission). Road noise is the vehicle at high speed when the wind cut into the formation of noise and driving chassis driven by vibration, and the road sand impact on the car chassis will also produce noise, which is the main source of road noise (mainly through: four doors, trunk, front fender, front wheel arc and transmission). @2019