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A comment on A Brighter Future for Electric Cars and the Planet. Parent comment

Re:A Brighter Future for Electric Cars and the Planet by konschubert on Monday July 24, 2017 @06:27PM (#14843320)
Most of the noise at speeds greater than a few km/h is wheel noise and air noise.

The engine noise plays a very small role at higher speeds.

An electric 18-wheeler running down the highway will not be significantly quieter than one with an ICE.

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Re:A Brighter Future for Electric Cars and the Planet by legulere on Monday July 24, 2017 @07:08PM (#14843567)
I really like this graphic for that effect: http://www.leiserstrassenverkehr.bayern.de/assets/stmi/vum/s...

Yellow is trucks, blue is cars. Full line is total noise, broken line is noise by wind and tires, dotted is noise by the motor.

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Re:A Brighter Future for Electric Cars and the Planet by sliverstorm on Monday July 24, 2017 @06:42PM (#14843413)
Tire noise, specifically, from the rubber flexing and air whooshing as it gets compressed out of the contact patch.

An electric 18-wheeler though could actually wind up a lot quieter- the noisiest thing about them is the Jake brake, and regenerative braking could do that silently.

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