Approximately 10 percent of the U.S. adult population — over 25 million Americans — experience some form of tinnitus. And an even larger percentage is suffering from hearing impairments.
Broken mufflers and loud engines mask the tinnitus sounds and finally they can relax. This is also the reason why they prefer to hang their Freeways in the air, in the middle of the city. And why their cafes are unbearably loud with the sound of refrigerators competing with the loud music.