What Causes the Sound of Rain-Like Noise in a Car?
2 Answers
Car rain-like noise may be caused by the last section of the exhaust pipe's muffler making noise or the shock absorber rubber sleeve being damaged. More details about mufflers and shock absorbers are as follows: 1. The car muffler is a device that prevents the sound emitted by the car from propagating while allowing airflow to pass. It is the main component for eliminating aerodynamic noise and the most important device in the car's exhaust system for reducing noise. When using a muffler, it is necessary to choose materials that are fireproof, moisture-proof, and corrosion-resistant. Generally, the greater the noise reduction of the muffler, the higher the pressure loss and price. 2. The car shock absorber can improve the smoothness and comfort of the car's ride and reduce the impact force on the car body. Shock absorbers are usually installed in the car's suspension system. The performance of the shock absorber directly affects the car's driving stability and the service life of other components. When the shock absorber rubber sleeve is damaged, the damping effect is reduced, leading to the appearance of noise.
After driving for so many years, the most common noise issue I encounter on rainy days is clogged sunroof drainage holes. Rainwater flows down from the sunroof and should normally drain out through the drainage tubes, but if leaves or dust block them, water accumulates in the drainage channels, making a dripping sound like rain. Additionally, aging or damaged body seals can allow rainwater to seep in through door gaps or window crevices, causing a splashing noise as water flows onto the interior. Especially if the drainage holes at the bottom of the doors are clogged, water sloshing inside the doors can be even more annoying. It's important to regularly clean these areas with a thin stick or high-pressure air gun to prevent water from seeping into the carpet or electrical systems, which can lead to rust or short circuits. Before driving in the rain, it's best to check these areas first. If you hear any noises, address them promptly to avoid turning a small issue into a big problem.
