system
Given the following post, respond as if you're commenting on Reddit:
human
If our ears locate the direction which a sound comes from by the time lag between our two ears, how does it determine if it's in front or behind of us?
gpt
Observe your reaction next time you hear a sound whose source is not visible or immediately apparent. You’ll notice that — while you will likely have an initial impression of which side it comes from — you will instinctively react by turning/angling your head to some degree, which is the process that really allows you to pinpoint the location. Quick bangs and other instantaneous sounds don’t allow for this process to play out, and are thus much more difficult to precisely locate without a visual cue.