jasonr (Jason Rumney) @ f2s.com wrote in message

"Nigel Pendse" writes:

Presumably the sound seems louder because the Piccadilly Line trains
are normally non-stopping and running through the station relatively
fast. There aren't many other stations with Tube trains passing
through at speed.

Jubilee Line between Wembley and Finchley Rd (IIRC the noise from Met
Line trains is the same).

I meant Tube in the specific sense of LU's trains for deep bore tunnels. I
think sub-surface LU stock (A, C or D stock) do make a different sound,
presumably because they're a bit heavier and also move differently on their
(softer?) suspensions. The firmer suspensions of Tube stocks probably excite
different resonances.