Ok I'm totally deaf in my left ear now what.?
If you have total hearing loss in one ear, unfortunately you won't be able to get the binaural effect. However, some people say a monaural beat is just as effective (though I haven't tried it myself). All you need to do is put your phone into "mono mode" somewhere in settings (exact instructions vary based on what device you're using) and the beat will come out of both earphones.
baldrick hornby