Are we able to detect the direction or the distance from which a sound comes with just one ear?
I don't know if the inner ear works as a single point sensor or if it has multiple sensitive regions, like an array of sensors, like the retina.
Or we can only do it if we use both ears? In that case, the source would only be partially located on a 3D space.
Would it be useful to make headphones with multiple speakers for each ear? (Not for different frequencies but at different locations).