What is the Normal Decibel Level for Interior Car Noise?
4 Answers
Interior car noise below 60 decibels is considered normal, with 40 to 60 decibels representing typical conversation levels. According to regulations, the noise level inside passenger vehicles should not exceed 82 decibels; the noise level near the driver's ear should not exceed 90 decibels. Any interior noise below 60 decibels falls within the acceptable range. Car noise is categorized into interior noise and exterior noise - the former affects passenger comfort while the latter causes environmental noise pollution. Sources of automotive noise include: engine noise, wind resistance noise, air conditioning noise, tire noise, transmission system vibration, body torsion and vibration, and braking noise.