The Škoda DuoBell is a clever solution to a digital-age problem. Its unique design bypasses the noise-canceling features of modern headphones, ensuring that even those in their sound bubbles are aware of passing cyclists.
Researchers from Škoda, working with experts at the University of Salford, discovered a 'safety gap' between 750 and 780 Hz – a frequency range where active noise cancellation systems fail to mask sounds. The DuoBell's innovative design taps into this gap, making it particularly effective.
With its mechanical structure and resonator tuned to higher frequencies, the DuoBell generates rapid strikes that are harder for ANC systems to cancel out. This means that cyclists can now alert people in their sound bubbles up to 22 meters earlier than with traditional bells.
In tests conducted on London streets, cyclists using the DuoBell were able to get pedestrians' attention five seconds before they would have otherwise. The study concludes without details on pricing or availability, leaving enthusiasts and safety advocates eagerly awaiting its release.







