There is a tremendous healing benefit of sound.  Since everything that moves is vibrating, it is making some kind of sound.  Sound healings utilize different instruments, such as quartz crystal bowls, Tibetan bowls and drums, at various frequencies in order to help balance the body on a cellular level.  This helps in unblocking stuck energies which assists in relieving stress, anxiety, depression and other ailments.  Often people feel calm, relaxed and at peace after a sound healing session.