Mammals are good at figuring out which direction a sound is coming from, whether it’s a predator breathing down our necks or a baby crying for its mother. But how we judge how far away that sound is was a mystery until now. Researchers report that echoes and fluctuations in volume are the cues we use to figure the distance between us and the source of a noise.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/ZHANczI59bs/150401140833.htm
How we hear distance: Echoes are essential for humans to perceive how far away a sound is
1 abril 2015
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