What is the typical decibel level of car noise?
2 Answers
Generally, car noise is below 60 decibels. According to the safety technical requirements for motor vehicle operation, the interior noise level of passenger vehicles should not exceed 82 decibels, and the noise level near the driver's ear should not exceed 90 decibels. Noise levels below 60 decibels inside the car are considered acceptable, with 40 to 60 decibels being the normal range for conversation. The vehicle's engine is one source of noise, which can be generated and transmitted through the front fenders, hood, firewall, and exhaust pipe. Road noise occurs when the vehicle is driven at high speeds, caused by wind cutting in and chassis vibrations, as well as gravel impacting the undercarriage.
I always pay special attention to the sounds in my car while driving. Generally, the noise level inside a car while driving ranges between 50 to 70 decibels. Specifically, during city traffic jams or low-speed driving, the noise is lower, usually below 50 decibels, as quiet as a soft conversation. On the highway, when driving over 100 kilometers per hour, the noise level can surge to over 60 decibels, even exceeding 70, making it feel like there's a machine roaring around you. Many factors influence the noise level, such as the type of engine, tire wear, road conditions, etc. New cars are quieter than old ones, and concrete roads are noisier than asphalt ones. I remember once on a long drive, the noise was so loud that after a while, my ears felt uncomfortable. Therefore, I recommend regularly checking the tires and suspension system. Opening windows for ventilation can also easily increase noise, and keeping the interior clean can help reduce annoying buzzing sounds.
