I am revisiting ths post. I know I answered about the calming things in nature, but the OP also asked about anything upsetting. I do not know if this is really considered upsetting, but since I have had the deck , I have been sitting outside a lot more. A couple weeks back I could not sleep, so about 10PM I went to sit outside. Did not turn on the light, so it was pretty dark out. I was a bit creeped out by some of the night sounds that I am not used to hearing. Maybe because I could not identify them.
One thing I noticed was no crickets. I though they were everywhere. I asked a neighbor, and he agreed..no crikets.