4 ms·
Sound travels around corners. It not only reflects very well but the way some low frequencies spread out is enough to allow certain vehicles to be heard before
by buro9 9y ago
Sound travels around corners.
It not only reflects very well but the way some low frequencies spread out is enough to allow certain vehicles to be heard before they are visible (solid concrete could obscure the view).
- cesarb 9y agoAlso, sound can give early warning of an approaching train, or of an emergency vehicle nearby, or of a truck in reverse.