Škoda Auto has developed a new bicycle bell called DuoBell, which is designed to penetrate the noise-cancelling technology of headphones, increasing the likelihood that pedestrians will hear it. The bell was developed in collaboration with scientists from the University of Salford, who identified a specific frequency range that can bypass active noise cancellation. The DuoBell is intended to reduce collisions between cyclists and pedestrians, particularly in urban areas where the number of cyclists is increasing. The bell has been tested in real-world trials and shown to be effective in alerting pedestrians wearing noise-cancelling headphones.