What is the normal decibel level for car noise?

[VonAddyson]

Generally, the noise level inside a small car is considered normal if it is below 60 decibels. A sound level of 40-60 decibels is equivalent to a normal conversation. According to GB-1495-2002, the external noise limit for small cars (M1 category vehicles) is 74 dB(A) (decibels). Currently, there is no mandatory standard for internal noise levels in passenger cars. More details are as follows: 1. 1 decibel is the minimum sound level that the human ear can detect. Sounds below 20 decibels are generally considered very quiet. 2. 20-40 decibels is roughly equivalent to a whisper near the human ear. 40-60 decibels is the range for normal conversation. Sounds above 60 decibels are considered noisy. 3. 70 decibels can be considered very loud and may start to damage hearing nerves. Exposure to noise levels above 90 decibels can cause hearing damage. Therefore, a car interior noise level below 60 decibels is within an acceptable range.