Noise
We live in a world so overcome with sound, and yet we never notice it.
We got used to hearing car engine rumbling and honking so much that we no longer pay attention to it, but it doesn’t stop the sound from pressing our mind. If you’d like to see just how big is the effect, spend a week in the nature far away enough to not hear any noise barring the nature’s own. I promise you: you will be overwhelmed when you come back.
Or, if you leave in a small enough city, take a walk at night. During that time, you can hear people near you breathing, and every step you make matters. If a car decides to roar at night, you can hear it’s engine streets away, and all it has to do to sound like a wild cat is to ramp up the rotations just a little bit.
At day, however, having a quiet moment with somebody is a luxury for most of us, even with sound-proof windows installed. We no longer live in a world where quiet is the default; to keep our vast productive civization steady, we have to come to terms with noise – a deal that’s bad for us to make.