It all soundsideal, but before you start booking that trip to the South Pacific with ambitions of testing an NFC-equipped 2012 iPhone, remember this: the patent was originally filed in 2008.
Other qualities that make music ideal for workouts are motivational sounds and lyrics think the theme from "Chariots of Fire" with its associated image of men running on the beach.
As The Asahi Shimbun reports, that system isn't the best for producing deep bass (making them less than ideal for music), but it apparently fares considerably better with the medium and high-pitched sounds of birds and rustling tree branches.