Formula one's new V6 engines are so quiet that they caused a lot of controversy when first introduced:
http://www.f1fanatic.co.uk/2014/06/17/f1-spectators-say-new-...
The only race I've been to was in the early 2000's so it was a different engine back then.
Formula one's new V6 engines are so quiet that they caused a lot of controversy when first introduced:
http://www.f1fanatic.co.uk/2014/06/17/f1-spectators-say-new-...