- Skoda created a bike bell designed to cut through ANC headphones.
- It uses a specific frequency and irregular strikes to beat noise cancellation.
- Tests showed pedestrians gained up to 72 extra feet of reaction distance.
Riding a bike anywhere that pedestrians travel can be a bit sketchy in today’s modern world. It’s hard to go anywhere without seeing walkers, joggers, and runners blissfully enjoying noise-cancelling headphones these days. Now imagine trying to alert such a pedestrian to your presence, only for them not to hear anything. Skoda says it’s fixed the issue with something it’s calling the DuoBell.
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The Czech automaker developed a prototype bell with researchers and audiologists from the University of Salford after looking into how modern ANC headphones affect a pedestrian’s ability to hear cyclists. Their findings were eye-opening.
The research behind it highlights just how widespread the issue has become. In London, roughly half of pedestrians wear headphones with active noise cancellation. According to Transport for London, collisions between cyclists and inattentive pedestrians jumped 24 percent in 2024 alone.
Instead of simply making the bell louder, the team got clever. Researchers found a narrow “safety gap” in ANC systems between 750 and 780 Hz. DuoBell emits sound in that range, then adds a second resonator and a hammer that strikes in an irregular pattern.
The result is a sound that ANC algorithms struggle to recognize and suppress quickly enough. In other words, it effectively sneaks past the digital gatekeepers inside your headphones. The system is entirely mechanical, relying on acoustic design rather than electronics to bypass ANC processing.
During testing, pedestrians wearing ANC headphones had up to 22 meters (72 feet) of extra reaction distance when DuoBell was used instead of a conventional bell. That is a massive difference when a cyclist is approaching at city-street speeds. Deliveroo riders who tested the prototype in London reportedly liked it enough that they wanted to keep the bells afterward. It’s easy to see why.
That extra time and space is key, but the design itself is fetching too. It features Skoda’s Modern Solid aesthetic with colors, finishes, and materials that tie directly to the cars in the current lineup. Sadly, all of this work won’t be available to the general public… at least not in the prototype form we see here.
The good news is that Skoda is making the data available to other manufacturers so that they can build bells like it. From the perspective of this cyclist, it can’t happen soon enough.
