Low-flying aircraft could soon fill the skies. Scientists are trying to fight the noise they could bring.
— In 2018, aerospace engineer Daniel Cuppoletti went to a conference in Los Angeles about the future of metropolitan air transportation. He arrived skeptical about the mere intent of the summit, which was run by ride-hailing company Uber.
He began researching this issue with colleagues at the University of Cincinnati. There is one particularly thorny problem: when propellers whoosh and whir, even when they're connected to electric engines, they produce a lot of sound. The European Union Aviation Safety Agency has recently reported safety, security and noise as the top three concerns for drones.
One way to reduce the unwanted impacts of these vehicles is to route them over roads, which are already noisy, said Antonio Torija Martinez, who studies the impact of drone noises on communities at the University of Salford in Manchester, England., he published a paper that asked participants to rate noise from drones when they were inside a virtual reality headset with a range of different urban environments: from quiet streets to busy main roads.
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