You need eyes to perceive light, ears to hear, a nose to smell…. You have other organs compromised of that which is above the physical and able to perceive that which is above the physical. You need to develop them through use in order to gain perceptions from them. Once you have some perception of those forces you can see how they relate to the phenomena of the physical. To try and understand what is primarily spiritual from the physical is like trying to understand a person by their shadow.
People healing with sound are not primarily working with movement of air, but the movement of air is the physical shadow of the spiritual action.