How to Improve Car Soundproofing Effect?
3 Answers
Methods to improve car soundproofing effect are as follows: 1. Install sealing rubber strips on the car doors to achieve good results; 2. If the tire noise is significant, you can replace them with silent tires or directly install soundproofing on the wheel arch liners; 3. For higher soundproofing requirements, a full-car soundproofing treatment can be performed. It is essential to choose high-quality materials for vibration damping sheets and soundproofing cotton, as inferior materials may harm health. Below are the options for soundproofing materials: 1. Foam sound-absorbing material: Utilizes the low hardness and low rebound physical properties of foam to absorb sound wave energy (heat) and then slowly release it. 2. Vibration damping composite material: A type of composite material that can absorb vibration energy and convert it into other forms of energy (such as heat) to dissipate, thereby reducing mechanical vibration and noise. 3. Soundproofing cotton (thermal insulation cotton): Soundproofing cotton not only serves the purpose of sound absorption but also provides excellent thermal insulation. When applied inside the car hood, it prevents the high temperature generated by the engine from directly transferring to the hood, thus protecting the paint on the hood, slowing down the aging process, and avoiding the rapid evaporation of rainwater on the hood during rain, which can produce fog and affect visibility.
I previously did soundproofing on my car myself, mainly by applying double-layer soundproofing foam to the doors, wheel arches, and chassis. When removing the door trim panels, be careful with the clips—it's best to buy spare clips in advance. Before applying the soundproofing foam, clean the metal surfaces with alcohol to ensure proper adhesion. Pay special attention to the tire areas; besides the inner wheel arches, the spare tire well should also be fully covered. After this treatment, wind noise at high speeds was noticeably reduced, and the audio system sounded better. The total cost of materials was just over 500 yuan. Remember to recheck all wire connections after completing the soundproofing to avoid loose contacts causing poor connections.
My old car was extremely noisy, so I took it to a professional modification shop for a full soundproofing treatment. The technicians first applied butyl rubber damping sheets inside the doors to suppress vibrations, followed by a layer of sound-absorbing cotton. The most time-consuming parts were the chassis and trunk, as they required removing the seats and carpets, but the results were the best. They also specially treated the engine firewall area with heat-resistant materials. The most noticeable improvement after the job was the reduction in tire noise, and the humming sound when going over speed bumps was almost completely gone. The only downside was the price, which was a bit expensive at over two thousand yuan, but it was definitely more hassle-free than doing it myself.
