Train sound systems??

[RonaldC]

I would like to have the sound of the train as it rolls by heard, are there any systems that can be mounted on the train to mimic the clack, grinding steel vs. steel as it goes by or do I need to put speakers in different layout locations? I was thinking of putting the speaker inside a boxcar so as it went by you would hear these sound instead of having speakers in fixed locatons. Any and all suggestions appreciated.

Thanks

 

[jbaakko]

There are many on board DCC sound systems. Two of the better aftermarket ones:
LokSound
SoundTraxx Tsunami

You also have MRC, and QSI.