787 Dreamliner cockpit noise and windshield wipers

[Check Airman]

Hi,

I was recently in the Jumpseat of a 777, and one of the pilots said the cockpit of the 787 is so quiet because the wipers are stored vertically.

I’d have thought it has more to do with the design of the nose and the fixed windows.

Can anyone point to an authoritative source on the matter?

Thanks