You enter a pitch black anechoic chamber. You'd expect absolute silence, the quintessence of nothingness. But such a thing doesn't exist, you should have guessed it.
You are unwittingly disrupting the balance, and a visceral feeling literally draws the uncanny outlines of your worst enemy : yourself. We start to have doubts about our identity, reassessing our sanity, looking for an invisible presence over our shoulder. But it's the right thing to do to overcome our fears.
A biology of silence. Dotflac