I’ve noticed Siemens’ trains out of London have quiet electric motors, whereas even the other new electric trains have noisy humming motors. I believe the AC m

I’ve noticed Siemens’ trains out of London have quiet electric motors, whereas even the other new electric trains have noisy humming motors. I believe the AC motor wave forms maybe smoothed out, I was very impressed by it. To the UK train companies just not value it? To me it was an impressive quality improvement. It is a detriment to all the other trains I travel on.