Why is the car noise so loud?
2 Answers
The reasons for loud car noise are: 1. Chassis noise: Low-end cars only have a few small shock-absorbing rubber plates and a small amount of sound-absorbing blankets installed at the factory. Poor assembly, looseness, or aging and faulty parts in the suspension system cannot effectively reduce vibrations; 2. Tire noise: Vibrations and noise caused by uneven road surfaces can also enter the cabin; 3. Engine noise: The most noticeable noise comes from the engine, especially in cars that haven't been serviced for a long time; 4. Wind noise: Wind noise occurs when the pressure of the oncoming wind exceeds the sealing resistance of the car doors during high-speed driving, and the faster the speed, the louder the wind noise; 5. Shock absorbers: Normally, shock absorbers reduce vehicle vibrations when going over speed bumps. Once the car's shock absorbers fail, their effectiveness diminishes, reducing comfort and increasing cabin noise.
I've been repairing cars for nearly twenty years, and excessive car noise is really a common issue. When there's severe wear inside the engine, loose piston rings or excessive valve clearance can produce a squeaking sound, like teeth grinding. Tire problems are the most frequent—uneven tread wear or incorrect tire pressure (too high or too low) causes a humming noise at high speeds. A leaking exhaust system with a perforated muffler sounds like drumming. Aging suspension shock absorbers make a thumping noise over small bumps. Wind noise shouldn’t be underestimated either—damaged door seals or noisy side mirrors create a high-pitched whistle at speed. These issues aren’t just annoying; they hide major risks, like a failing wheel bearing that could cause a wheel to detach. Over time, loose interior parts, such as unfixed rear seats, can also buzz. I always advise car owners to check tire pressure monthly and get an annual major service with oil changes and component inspections—early fixes save money and ensure safety. Excessive noise is often a sign of aging—don’t delay; a thorough inspection at a repair shop is the safest approach.
