Periphery.

I am at work.
Within earshot is a Polynesian choir singing in a language I don't understand, a too-loud television blaring Fox news, the hum of distant exercise machines, the sound of my fingers on my laptop keys, and the vibration of my cell phone.
I find it fascinating that I can distinguish every one of these sounds, automatically gauging their distance from me and whether or not they contain an element of pressure. For example, I can hear my phone move across the table, and the deep, moving quality it exudes isn't the same as the clear tone I hear when it beeps. It isn't a sound, it's a feeling, but I'm not close enough for it to be physically real.