Most phones have stereo microphones and they're individually accessible by apps. Combined with the accelerometer for rough position change tracking, it must be possible to build. Would be super cool to see in the dark like that.
Edit: wait, we don't just have two mics in our head, we also have our outer ear that's required for this. I guess the phone would need physical addons for this to work.
Edit: wait, we don't just have two mics in our head, we also have our outer ear that's required for this. I guess the phone would need physical addons for this to work.