First Bike Bell Designed to Be Heard Through Noise-Cancelling Headphones: ŠKoda DuoBell

Škoda unveiled the DuoBell, a mechanically simple bike bell designed for urban safety.

It uses a tuned dual-tone at 750 Hz that can cut through active noise cancellation better than standard bells.

Testing found it was heard earlier, which could help reduce cyclist-pedestrian collisions in cities.

The idea targets a growing problem as headphones make warning sounds easier to miss.