Yeah, I don't get that...

or rather I do... 'manipulation', (piping in crowd noise). But I don't know about the 'science' behind that decision... of course I'm sure they have an entire team of PHD's that have studied this but it just doesn't seem right to me... in that, and perhaps not immediately, fans would adjust to no crowed noise quickly, it seems to me... no crowd noise would seem to me to be less interfering than phony crowd noise.