I wish you made something much simpler like this:
<a href="http://www.youtube.com/watch?v=v4ehaGeo6vs" rel="nofollow">http://www.youtube.com/watch?v=v4ehaGeo6vs</a><p>All that is needed is just a plate of metal with a frame to stop the sand from spilling over and a sound wave generator that generates sounds based on your EEG.<p>The big bonus is that you can HEAR your own brain this way and by adding your own heartbeat as background music, you will instantly have an much better feeling and maybe even have an out of body experience. (It's shown in studies that the own heartbeat can help induce that)