An experiment in background noise.

Having seen so many people fall asleep on subway trains, I wonder if the sound only would also be somniferous.

Using my cellphone I recorded the ride (including boarding and alighting) on the Toronto subway (line 1) from College Station, north to Sheppard/Yonge Station. There was always at least one person sleeping (or at least appearing to be asleep) during the ride.

Google Maps - goo.gl/aq97jR

So far, listening to the recording has not put me to sleep.