I can't seem to find a good source for the noise complaint part, so it may be hearsay (sorry for the potential misinfo). Wiki seems to attribute it mostly to is

I can't seem to find a good source for the noise complaint part, so it may be hearsay (sorry for the potential misinfo). Wiki seems to attribute it mostly to issues with track electrification and some other issues: http://en.wikipedia.org/wiki/Acela_Express#High_speed_issues http://en.wikipedia.org/wiki/Acela_Express#High_speed_issues Most of the track is definitely not equal to the special stuff laid down for the TGV's very high speed sections, so I'm sure that's a contributing factor.