It seems like I have different kinds of H, so I'll talk about H without pain.
Some sounds just seem too much for me -- airplanes, trains, and motorcycles. They don't cause me pain but they're so loud to me that I instinctively feel the need to cover my ears.
Then there's the sensitivity to faraway sounds. At work, my desk used to be beside the window. I sat there for more than a year, and I never heard the honks of cars down below. I heard the occasional sirens but everyone sitting by the windows could hear them.
When I got H, I heard all the honking, screeching, squealing of vehicles. They weren't painful but so distracting. Because of that, I had to move my desk away from the window. So yeah, some sounds stand out to me, including the "S" sound when people speak.