I work with my clients with sounds. Everyone has their own unique sound for perfect health. I hear that sound and teach it to each person so they can use it when they need it.
I came across this NPR article/broadcast. Here's an excerpt from it:
"And hearing is special among senses, Horowitz says. Sound can travel a long way. It will propagate through anything — the ground, water. It works at night, goes around corners. 'Sounds give you sensory input that is not limited by field of vision'
Given how well sound reflects what's going on around us, the brains of vertebrates — including humans — evolved to be exquisitely sensitive to it."
Is it any wonder that certain vibrations can have a profound healing effect?