As I've aged my sensitivity to various sounds has increased significantly. I attributed it to the PTSD and OCD because many sounds make me literally jump. Simple things like the doorbell ringing, phone ringing, knocking on my door, and then the obnoxious extremely loud volume that neighbors have their stereo systems set to. Barking totally drives me up the wall, and I wish the pet owners would realize not everyone appreciates the annoying sounds of their pets especially when they make no attempt to quiet them. I've been wearing earplugs at night for years to block out some of the snoring from my husband. I'm just curious as to what percentage of the US population is extremely sensitive to noises.