Silent running: Falken cut noise from car tyres by up to 10 decibels

The patented Silent Core technology was developed in collaboration with Falken’s parent company Sumitomo Rubber Industries (SRI). It uses a layer of ether-polyurethane foam applied to the inner surface of the tyre to damp vibrations and resonance in the air trapped within the carcass.

Left unabated, these vibrations travel up through the suspension and into the cabin, where they’re heard as the characteristic tyre drone. Advances in powertrain design and aerodynamics mean this is often now the single biggest contribution to cabin noise, so any form of attenuation is useful.

While Falken is not alone in using a foam core to damp these oscillations, the company’s successful patent application suggests its approach differs somewhat from other manufacturers. The construction is described as a ‘double-hump’ shape, which may contribute to the acoustic properties.

The manufacturing process is now said to be mature enough for series production and the Silent Core tyres are undergoing a pilot phase with a well-known automotive manufacturer. Falken reports that its testing to date has shown no adverse effects on performance or tyre life.