This is what I do… find a comfortable position, then start relaxing all of your muscles.
Start with your toes … given them a wiggle and relax them. Slowly move up your body into your torso… then down your arms, and finally your neck and head.
I’m usually out before I get to my arms.
As a hearing aid wearer myself, I would question the validity of this as a viable alternative to real hearing aids for moderate to severe loss.
Of course many people with hearing loss will use these instead of getting professionally tested and fitted.