Add a second one to the same headband and im curious how good you could get at navigating with such a device. Also, i think itd be fun to have emotive little antennae on your head.
Alright i got one for you guys tell me what you think of this: you could put a small remote operated robot arm on a headband, with a distance sensor mounted to it. Using vibrations or maybe pitch you could translate the distance the sensors are getting to sensory input.