Boltar wrote:

Ian Tindale wrote in message
...
Boltar wrote:

Pressurised air in the brake pipes or tanks moving about?
Sound of the brake pads on rubbing on the discs?
Anything else that can produce a kind of white noise sound really

That's a completely different kind of sound to that described in the
subject.

Not necessarily , plenty of streams sound just like white noise and so
does water coming out of a tap very fast.

Well, there you are. The running water sound, described in this thread,
sounds like, well, water that is running - trickling - flowing gently from
point a to point b. It's not a torrent, nor a gush, nor does it imply that
the water is in any particular hurry. It's a gentle sound of water on its
way from one part of the train to another, seemingly induced by the motion
of the train itself. As the train starts up and gathers speed away from a
station, you hear the water running past. As the train loses speed to enter
a station, you hear it running back again. It doesn't sound like much
quantity of water either. It just seems to gently make its way from one end
of the train to the other, while more running water comes along, and so on.

--
Ian Tindale