New funding for universal sound for e-scooters | Traffic Technology Today
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UCL and London e-scooter operators team up to research 'universal sound' for e-scooters in the capital - TIER
Scientists creating universal e-scooter sound to help pedestrians detect them | Road safety | The Guardian
E-scooter firms to develop universal warning sound after collisions | Transport | The Guardian
Introducing sound into Voi's electric scooters
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Segway's Strap-on Speaker Makes Your Scooter Sound Like a V8 - News Vex
Electric scooter warning noise research sounds note of optimism | E&T Magazine