Power Saving Headphones

Quick concept for some power saving headphones.

The idea being that underneath the rubber ear piece is a ring of pressure points. When the pressure points are out, the headphone speaker is off. When the pressure points are in (i.e. headphone is in the ear) the headphone turns on.

The aim of this concept is to:-

1) Conserve power to the device.
2) Reduce annoying scallywags on public transport playing their music to loud when their headphones are in their hand -_-
3) To promote an all round greener planet ;-)