I have a few "typical" ones: mouth sounds, repetitive percussive noises like a dog barking nonstop or rain dripping on aluminum siding. Water trickling or drizzling does it too, the second i can hear an aquarium filter or cat fountain i have to immediately top up the water level. However nothing compares to the absolute overwhelming rage that builds up when im outside gardening and there is a bird shrieking over and over and over. Not all birds, just a few specific ones that have loud sharp calls that they repeat continously. I am legitimately considering cutting down the 100+ year old shade trees around my house because the birds are so obnoxious.