Basically the train riders, if they rested their head on the aluminum wall/frame, they'll get an advert beamed directly into their head. If they do this, and you need to ride their trains, get a 14" square sheet of quarter inch rubber to use as a head rest.
http://tech.slashdot.org/story/13/07/05/1755258/sky-deutschland-considering-using-bone-conduction-to-force-ads-on-train-riders
http://tech.slashdot.org/story/13/07/05/1755258/sky-deutschland-considering-using-bone-conduction-to-force-ads-on-train-riders
no subject
Date: 2013-07-12 07:26 am (UTC)