What Decibel Level Indicates Good Sound Insulation in Cars?
2 Answers
Vehicle noise standards are below 60 decibels, where noise refers to the sound emitted by road and rail vehicles during operation. Additional information is as follows: Causes of excessive car noise: Engine carbon buildup; shock absorber failure; large gaps in the cabin or vehicle body; tire aging; internal damage to the valve guide; cooling system malfunction; poor oil quality; engine misfire; spark plug carbon buildup. Solutions for excessive car noise include: Installing sound-absorbing foam material under the engine hood can suppress vibrations caused by the hood and absorb a significant amount of noise; adding damping plates along with sound-absorbing mats can address road and tire noise; installing or replacing door seals; tightening screws or replacing parts.
As a driver who frequently takes long-distance trips, I believe the standard for good sound insulation depends on the specific situation. At a speed of 80 km/h on the highway, if the interior noise is below 65 decibels, it's generally considered quiet; if it can be reduced to 60 decibels, it's truly a pleasure. In city driving with frequent traffic lights, 50-55 decibels is also quite good. However, decibel levels aren't the only factor – wind noise and tire noise have a significant impact. If you often feel a buzzing in your ears while driving an older car, the noise might be above 70 decibels. I recommend using a smartphone app to measure noise during a test drive or checking data from automotive review websites. Don't just rely on brochures – actual driving conditions, such as rough road surfaces, can increase noise. Some tips to improve sound insulation include switching to quiet tires or adding sealing strips, which can make a noticeable difference. In short, low noise levels make driving less tiring, which is especially crucial for long-distance drivers.
