What about if a person is hard of hearing or has tinnitus or has hearing aids, does it still work?
When it comes to partial hearing loss, my main suggestion would be to use some kind of mixer that shifts the balance more towards the affected ear, so the volume appears to be the same in both ears. Be careful NOT to increase the volume in BOTH ears, as you don’t want to go deaf in your good ear!

If you have total hearing loss in one ear, unfortunately you won't be able to get the binaural effect. Some people say monaural beats are just as effective, though I haven't tried them myself. All you need to do is put your phone into "mono mode" in your device's settings and the beat will come out of both earpieces.
Sue Vine