Hi all,

There's a London-oriented email newsletter thing called London by London;
it's like Notes & Queries in structure, with people asking questions and
other people answering them. This one doesn't have an answer yet, so i
thought i'd pass it on:

"Your post reminded me to ask the LBL readership (is it really 10,000
strong?) if anyone has heard another noise made by jubilee line trains. I
can only describe the noise as the sound of running water. It's as if
you're the other side of a very thin wall and someone's just flushed the
loo in the next room. The noise seems to travel from one end of the
carriage to the other and yet no one on the carriage bats an eyelid at
this seemingly (super-) natural sound. Has anyone else heard it and do
they know what it is?"

Any suggestions?

This follows a question about the 'gear-changing noise' that comes from
the thyristors.

tom

--
I am become Life, destroyer of worlds