If you think about it, your car tire acts as a drum for road noises. The rubber absorbs a bump in the road, the same way the head of a drum absorbs a tap from a drumstick. The hollowness of the tire acts just like the cavity of a drum — allowing the noise to amplify and reverberate.
Polyurethane Foam Noise Canceling Insulation
Tire manufacturers have long been working to reduce road noise. One area where they’ve been successful is with the inclusion of noise-reducing polyurethane foam inside a tire liner on the opposite side of the tire’s tread. The...Automotive, Innovation Bonds