What is the standard decibel level for vehicle noise?

[LeKyle]

Vehicle noise standards are below 60 decibels. Noise refers to the sound emitted by road and rail vehicles during operation. The reasons for excessive car noise include: 1. Engine carbon buildup; 2. Shock absorber failure; 3. Large gaps in the cab or vehicle body; 4. Tire aging; 5. Internal damage to valve guides; 6. Cooling system failure; 7. Poor oil quality; 8. Engine misfire; 9. Spark plug carbon buildup. Solutions for excessive car noise are: 1. Install sound-absorbing foam material on the engine hood to suppress vibrations and absorb significant noise; 2. Use damping plates with sound-absorbing pads to address road and tire noise; 3. Install or replace door seals; 4. Tighten screws or replace components.

[EzraLynn]

As someone who frequently delves into automotive technology, I understand that vehicle noise standards are crucial safety regulations. Taking China as an example, the GB1495 standard requires passenger cars to produce no more than 75 decibels at 50 km/h and around 45 decibels at idle. This is based on the international ISO testing method, which measures noise levels with a decibel meter on simulated road surfaces. The standard is set to prevent excessive traffic noise pollution from affecting residents' quality of life. In practical application, new vehicles must meet these standards before leaving the factory; otherwise, they cannot obtain environmental certification. I recall that this value varies by vehicle type—trucks may be limited to 80 decibels, while electric vehicles are typically quieter at around 65 decibels, reflecting the standard's consideration of evolving times. Exceeding the limit may not only result in fines but also affect the vehicle's ability to pass annual inspections.

[LeHailey]

I always pay attention to noise control while driving, as excessive noise can be irritating. During vehicle operation, a standard noise level between 70-80 decibels is considered reasonable. If the car suddenly becomes noisier, reaching above 85 decibels, it indicates potential issues such as a damaged exhaust pipe or engine carbon buildup. I remember during my last road trip, as long as the noise meter showed below 70 decibels, everything was fine. Legally, regulations vary slightly by region, with urban areas typically enforcing strict standards, and violations may result in fines ranging from tens to hundreds of yuan. A simple suggestion is to maintain your car regularly, ensuring the muffler functions properly. This approach not only enhances safety and environmental friendliness but also reduces the noise burden on the community.

[McOscar]

I believe vehicle noise standards reflect society's emphasis on environmental protection. In the EU, noise limits typically start at 68 decibels, while the US is slightly more lenient at around 72 decibels. Exceeding the 70-80 decibel range may cause hearing damage or insomnia with prolonged exposure. As drivers, it's crucial to check noise level labels when selecting vehicles - this isn't just a regulatory matter but a health concern. Relatedly, with increasing urban noise pollution, the rise of electric vehicles is expected to reduce average levels to around 60 decibels in the future, driving the industry's green transformation.