What Causes the Clunking Sound When a Car Drives Over Uneven Roads?

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When a car makes a clunking sound while driving over uneven roads, it is usually due to a malfunction in the shock absorber or the shock absorber top mount. The connection points between the car's shock absorbers and the body are equipped with buffer rubber, which is a rubber component. Over time, rubber components can age and harden, leading to unusual noises when the car traverses bumpy roads. Shock absorbers can be categorized based on the damping material used, primarily into hydraulic and pneumatic types, as well as variable-damping shock absorbers. The primary function of shock absorbers is to suppress oscillations from the spring's rebound after absorbing shocks and to mitigate impacts from the road surface. While the suspension springs can filter out road vibrations when driving over uneven surfaces, the springs themselves still undergo reciprocating motion. The shock absorber is designed to control this spring oscillation.