@devilboy, did you really need to bring religion into this? Sometimes prayer works, sometimes a placebo works. Even the most talented scientists can't really explain it. And I am a scientist (stem cells!)
Harvard U. article on hearing loss research
For those of you geeks who are very much interested in how we hear:
http://news.harvard.edu/gazette/story/2017/03/replacing-damaged-hair-cells-may-help-treat-hearing-lo...
http://news.harvard.edu/gazette/story/2017/03/replacing-damaged-hair-cells-may-help-treat-hearing-lo...