Here is an example case I’ve just encountered.

This is the result for a 78 years old lady.
I did it for her just one time.
The diagnosis was sudden deaf in right ear
Even though she was a senior, her hearing was improve right away in just 2 days.
70–> 60dB at 250Hz
55–> 45dB at 500Hz

She’s already satisfied with the treatment.
However, we will do it again for more improvement.