DuoBell tunes a bicycle bell to outsmart noise-cancelling headphones
TL;DR Summary
Škoda's DuoBell is a passive bicycle bell tuned to 750 Hz with a sharp transient attack to break through active noise cancellation, plus a high-frequency component to preserve the bell's sound; in tests, ANC headphones reduced detection distance for normal bells, but the 750 Hz tone improved it by about 9.2 meters and lowered the detection threshold by 2.3 dB in noisy settings, and the device has no electronics—an analogue fix to a digital problem that raises questions about future liability as ANC tech evolves.
- Bicycle bell designed to defeat noise-cancelling headphones Boing Boing
- Škoda DuoBell: A bicycle bell that outsmarts even smart headphones Škoda Storyboard
- Škoda's cycling gadget helps you avoid crashing into audio-oblivious pedestrians New Atlas
- A bike bell that penetrates noise-canceling headphones. The Verge
- This cycling bell goes through the noise-canceling headphones en.brujulabike.com
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