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At highway speeds aerodynamic drag creates more noise than the motor itself (externally). So an electric car makes little difference there. Reducing speed reduc
by Inthenameofmine 6y ago
At highway speeds aerodynamic drag creates more noise than the motor itself (externally). So an electric car makes little difference there. Reducing speed reduces noise non-linearly. Therefore electric cars make a big difference for noise pollution in slower city streets. Inter-city travel just needs to be reduced, slowed down, and moved to well built electric rail.
- morsch 6y agoTrue for aerodynamic noise, but tire noise starts to dominate at speeds as low as 30 km/h[1]. Obviously it's going to vary depending on the car and the road cover. It certainly seems intuitively true from the quality of the sound at the side of a busy city street. EVs do nothing for that and aren't a panacea regarding roadway noise. I've been snuck upon by an EV in a parking lot a couple of times, but never on the side of the street. It would work if we limit the speed within cities to something like 20 km/h, which is something that, yes, we should be doing immediately. [1] https://www.drivingtests.co.nz/resources/are-electric-cars-quieter-than-petrol-or-diesel-cars/ https://www.drivingtests.co.nz/resources/are-electric-cars-q... https://en.wikipedia.org/wiki/Electric_vehicle_warning_sounds https://en.wikipedia.org/wiki/Electric_vehicle_warning_sound... https://de.wikipedia.org/wiki/Reifen-Fahrbahn-Ger%C3%A4usch https://de.wikipedia.org/wiki/Reifen-Fahrbahn-Ger%C3%A4usch