Are electric locomotives quiet? - NZ Rail Electric Locomotive Cab View Teaser

(This is primarily a sound demonstration, so please have your audio on - but maybe not too loud.)
It's often said that the EF class electric locomotives are very quiet... Today we do a sound demonstration to find out.
This is a teaser for the upcoming cab view mini-series, captured from the cab of a refurbished EF class electric locomotive.
Footage captured by GoPro mounted on the 2nd Person's side, out of the driver's line of sight, and not touched until the train was stationary and brakes were applied.