People ask me what I do in my spare time, and I look at them blankly, truly believing that I don't even have spare time, and if I did, I'd probably use it for something mundane, like chipping away at the mound of laundry rising to dangerous proportions in the back room.
Buyers of powerful cars place a high premium on the exhaust note, and manufacturers spend a lot of money getting it right. At the same time, high-end cars are expected to filter out the sounds of the mundane world.