<p>
An experiment in background noise.
</p>
<p>
Having seen so many people fall asleep on subway trains, I wonder if the sound only would also be somniferous.
</p>
<p>
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.
</p>
<p>
Google Maps - <a href="https://goo.gl/aq97jR">goo.gl/aq97jR</a>
</p>
<p>
So far, listening to the recording has not put me to sleep. 
</p>
