I don’t know if this happens in other places but I live in Montreal, Canada and as in many places we have an underground subway system that we call the “Metro.”
In any case, when the Subway train takes off it makes a chiming noise that can be associated with the notes “Do-Re-Mi” at every stop.
One person has recommended that perhaps it is a button that the train-car operator presses. Another theory is that it is the engine of the car picking up speed and just so happens to make that sequence. I believe it’s some kind of sensor that the car trips right when it leaves.
Anyone have any idea what causes this noise?
Thanks
My WAG is that it’s just a signal to alert people on the platform that the train is about to move/has started to move. somehow automaticly triggered by the train.
Here in New York the subways make a two-tone noise when the doors close to alert people to get the hell out of the way, but don’t make any special noise when the train starts. There is a button to open and close the doors (actually there’s two, one for each side.) which triggers both the sound and the door mechanism.