What Causes Abnormal Noises in Cars?

[MelanieMarie]

If a car's horn sound exceeds 74 dB, it is considered noise. Introduction to Car Horn Sounds: Car horn sounds are a major source of traffic noise pollution, characterized by sudden onset, short duration, and high volume. The horn sound of a small car can cause instantaneous noise levels to exceed 70 dB and approach 80 dB, while the horn sound of a large vehicle can exceed 80 dB. Noise poses significant harm to people, especially such sudden noises. Many local governments have regulations on car horn sounds. National Requirements: The "Law of the People's Republic of China on the Prevention and Control of Environmental Noise Pollution" stipulates that environmental noise pollution refers to the phenomenon where noise exceeds the national environmental noise emission standards and interferes with others' normal life, work, and study.

[JulietRose]

I often encounter strange noises while driving, such as clicking or squeaking sounds. Many of these are caused by loose or aged belts, which create friction noise if not tight enough. I've also experienced a buzzing sound due to insufficient tire pressure, which is quite annoying. If there's a clicking noise in the engine compartment, it might be due to valve clearance issues or insufficient engine oil. Sometimes, worn suspension components can cause creaking sounds when going over bumps, so checking the wheel hubs and shock absorbers is a good starting point. I recommend starting with easily visible parts, such as belt condition and tire pressure. Ignoring these small noises can lead to costly repairs, like when the braking system starts making noise and the pads need replacing. Regular lubrication and maintenance can prevent many noise issues—safety first, after all.

[LeEllie]

As a seasoned driver, I've encountered numerous car noises: squeaky belts due to aging are common; thin brake pads emit screeching sounds as a replacement reminder; engine ticking may indicate ignition issues or fuel pump failure; exhaust leaks produce popping noises. Loose suspension components creak over bumps, raising concerns. My diagnostic approach starts with visible components—checking belts, tires, and brakes first. For undercarriage noises, I crawl underneath to inspect exhaust pipes or suspension linkages. Neglecting these sounds accelerates part deterioration and compromises driving safety. I recommend annual full-vehicle inspections, especially for older cars—early repairs prevent bigger headaches.

[VonJake]

I get nervous when my car makes strange noises. Common issues include tire humming due to uneven air pressure, belt squeaking caused by friction problems, and brake screeching indicating the pads need replacement. Engine clicking sounds require professional diagnosis. I've found that ignoring strange noises can worsen the problem and affect driving safety, such as increasing the risk of brake failure. Timely repairs are crucial - don't delay until minor issues become major expenses. Regular maintenance can prevent most noises.