> Or imagine if you're blind. Trying to listen for tire noise.
When vehicles past a certain volume (which are not aggressively streamlined to shatter human-powered landspeed records) move faster than 25 kph (15 mph) they displace enough air that they are quite loud.
An automobile-sized vehicle isn’t some kind of terrestrial ninja when its engine doesn’t make noise. Depending on make, model and speed, the volume of displaced air is significantly louder than the engine running at constant velocity.
When vehicles past a certain volume (which are not aggressively streamlined to shatter human-powered landspeed records) move faster than 25 kph (15 mph) they displace enough air that they are quite loud.
An automobile-sized vehicle isn’t some kind of terrestrial ninja when its engine doesn’t make noise. Depending on make, model and speed, the volume of displaced air is significantly louder than the engine running at constant velocity.