"The DuoBell's mission is precisely to make itself heard even beyond the latest-generation barrier filters, ensuring that cyclists can react to imminent dangers on streets and sidewalks."
"Researchers discovered a 'safety gap' in the frequency range between 750 and 780 Hz, where sounds can reach the ears of people using ANC headphones."
"The bell's structure is completely mechanical, featuring an additional resonator tuned to a higher frequency, which improves the bell's overall efficiency."
"The rapid, irregular dings generated by the hammer mechanism are ideal for city environments, making it harder for ANC systems to cancel out the sound."
The Škoda DuoBell bicycle bell addresses safety concerns for cyclists using noise-canceling headphones. It produces a sound that penetrates the noise-canceling barrier, ensuring cyclists remain aware of their surroundings. Researchers identified a 'safety gap' in the frequency range of 750 to 780 Hz, which the DuoBell utilizes to be heard. The bell's mechanical structure, combined with a resonator and rapid hammer mechanism, enhances its effectiveness in urban settings, making it harder for ANC systems to cancel out its sound.
Read at WIRED
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