The purpose of relaxing sounds is to calm and soothe the body. A lot of people think relaxing sound is healing sound, but it's not. Relaxing music or environmental nature sounds aren't particularly healing, they just set up the environment, perhaps, for healing. It's more for calming and soothing. A second type of sound is what I call release sounds.
Release sounds have a different purpose.
They cleanse the body. We use release sounds every day when we cough and sneeze, when we moan, groan, laugh, cry - all these different sounds that we don't necessarily qualify or categorize. Just by their nature they have more volume, more specificity, as compared to relaxing sounds. They're for the purpose of cleansing, for clearing energy. If we repressed those sounds that we naturally make every day, we would be filled with so much tension and stress in the body .