Solutions to Reduce Wheel Well Noise Transmitted into the Passenger Cabin

Wheel wells are among the primary areas where noise infiltrates the vehicle cabin.

As the vehicle moves, noise predominantly arises from the friction between the tires and the road surface. On rough roads, debris such as dirt, sand, and gravel can be thrown into the wheel well area. These noises resonate into the cabin, preventing passengers (other than the driver) from fully enjoying a restful experience.

Sounds emanating from tires through the wheel wells:

• Low-frequency sounds: When traveling on smooth, well-paved roads, relatively new asphalt sections produce minimal humming noises.

• High-frequency sounds: Conversely, driving on deteriorated roads with potholes can generate squealing or wind-shearing noises.

• Rustling sounds: These occur during sharp turns, sometimes producing characteristic drifting sounds.

How to significantly reduce noise transmitted through the wheel wells:

• Utilize wheel well soundproofing services: Wheel wells are considered one of the top seven areas to prioritize in a comprehensive soundproofing package. Given the substantial amount of noise that enters the passenger cabin from this area, installing soundproofing materials can act as a barrier, significantly reducing the transmission of noise generated by tire-road friction.

• Apply underbody coatings: Coating the wheel wells is a minor step within the comprehensive underbody coating process. Water-based underbody coatings offer superior thickness compared to rubber or acrylic-based products. This coating adheres directly to the wheel well area, not only aiding in reducing some noise transmission into the passenger cabin but also providing rust and corrosion resistance.

Optimizing Tire and Wheel Selection for Road Conditions

As previously analyzed, noise transmitted to the wheel well is generated during the friction between the tire surface and the road. Therefore, in addition to using soundproofing materials and coatings, customizing tires and wheels plays a crucial role in creating a smooth driving experience.

Tires: Key Factors to Consider

• Rubber Material: Soft rubber tires absorb vibrations better, reducing noise, but they wear out faster. Hard rubber, often found in high-performance tires, offers better heat resistance and durability but may increase noise, especially on rough roads.

• Tread Pattern: The design of the tire tread significantly impacts noise levels. Tires with small, evenly distributed tread patterns (like touring tires) typically produce less noise due to reduced unnecessary friction. In contrast, off-road tires with large, aggressive treads generate more noise when driving on paved roads.

  Bridgestone

• Tire Pressure: Maintaining optimal tire pressure is essential, as both over-inflated and under-inflated tires can cause unwanted vibrations and noise. Regularly checking and adjusting tire pressure ensures a quieter and more comfortable ride.

Wheels: Key Factors to Consider

• Wheel Size: Larger wheels often provide better stability at high speeds but can increase noise due to a larger contact area with the road. Conversely, smaller wheels may offer a smoother ride but might not be suitable for high-performance vehicles or off-road conditions.

• Wheel Material: Wheels made from lightweight alloys (such as aluminum) reduce overall vehicle weight and can help decrease noise compared to heavier steel wheels. This reduction in weight also lessens the load on the suspension system, enhancing ride comfort.

By carefully selecting tires and wheels tailored to specific driving conditions, drivers can significantly reduce noise transmission into the passenger cabin, thereby enhancing the overall driving experience.