4 ms·
It's especially noticeable on the highway. A loud bike or car can be heard when it's in front of you, but if it's behind you it is practically silent, and that'
by Gracana 9y ago
It's especially noticeable on the highway. A loud bike or car can be heard when it's in front of you, but if it's behind you it is practically silent, and that's the time when it would be useful to notice it.