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Maybe the noise they generate is good for EVs which are dangerously quiet for pedestrians?
by 725686 5y ago
Maybe the noise they generate is good for EVs which are dangerously quiet for pedestrians?
- smilekzs 5y agoValid point, although pedestrian safety is mostly discussed in the low-to-mid-speed regime (<= 45 MPH), while tire noise (at least according to my own observation) dominates in the high speed regime (>= 65 MPH). There might be some overlap though. Also worth pointing out: NVH is not just Noise --- it includes Vibration and Harshness that are only felt by the people inside the vehicle.
- Scoundreller 5y agoAnd effective at rattling off any untorqued/loose nuts/bolts.
- agumonkey 5y agoSome EVs have mandatory sound emitters to not be fully silent (and thus dangerous). I thought it was weird harmonics from the synRM engine but it's synthetic and enforced by regulations.
- throwaway0a5e 5y agoI thought it was a plastic valence rubbing on something.
- agumonkey 5y agonah it's on purpose https://www.youtube.com/watch?v=mNkGD_Sryxg https://www.youtube.com/watch?v=mNkGD_Sryxg
- arecurrence 5y agoHybrids as well. The Toyota Prius has had this at low velocities since before EV cars were mass produced (I believe Toyota uses a speaker that makes a sort of sci fi sound). It is a legal requirement to generate a minimum amount of noise to sell a car in some countries.
- ggreer 5y agoEvery EV sold today must make noise at low speeds.[1] 1. https://en.wikipedia.org/wiki/Electric_vehicle_warning_sounds https://en.wikipedia.org/wiki/Electric_vehicle_warning_sound...
- speedgoose 5y agoYou can ear an EV very well, the rolling noise and the wind noise is difficult to miss. Of course if the EV is driven very slowly it's not noisy unless it has a fake sound like many does, but it's not very dangerous either.
- dharmab 5y agoIronically NVH is even more important in EVs since the engine noise no longer drowns out unpleasant sounds like fan motors, hums, squeaks/rattles
- ofou 5y agoNoise is not good, ever.