Where is sound insulation generally applied in a car?
2 Answers
Sound insulation in a car is generally applied to the doors, cabin floor, trunk, rear fenders, front fenders, hood, firewall, U-shaped channel, and roof. Different areas serve different purposes. Car sound insulation involves applying soundproofing materials to address various types of noise, aiming to reduce environmental noise inside the cabin. The soundproofing materials must be heat-resistant and fireproof to meet safety requirements. The method of sound insulation involves isolating the noise source from the cabin using soundproofing materials, preventing the noise from directly or resonantly transmitting into the cabin, thereby achieving the goal of noise control. Car sound insulation projects allow users to drive in a quieter environment. Car sound insulation is designed for true automotive enthusiasts who seek pleasure, aiming to enhance the driving experience and elevate the quality of life for more car owners.
I previously did soundproofing on my car myself, focusing on several key areas. The doors were a priority—after removing the interior panels and applying damping sheets and soundproofing cotton, the door-closing sound immediately became deeper, and wind noise at high speeds was significantly reduced. The trunk wasn’t neglected either, especially around the wheel arches, where I covered them with adhesive-backed soundproofing material, noticeably reducing tire noise. The chassis was a big project, requiring seat removal to lay down full-coverage soundproofing mats, but afterward, the sound of gravel hitting the undercarriage was almost inaudible. The roof isn’t a must, but during the rainy season, you’ll appreciate the layer of soundproofing cotton dampening the sound of raindrops. Lastly, a reminder: for engine bay soundproofing, opt for high-temperature-resistant professional materials, as regular foam can melt under heat.
