“Sound healing uses a frequency and vibration that is conducive for healing,” says Joshua Leeds, the author of The Power of Sound and an expert in the field of psychoacoustics, the study of the effects of sound on the human nervous system. Sounds, vibrations and frequencies support the immune system, help with insomnia and assist in relaxing muscle spasms. Neuroacoustic Research found that different frequencies target the various densities in the body. British doctors have developed a revolutionary new therapy using high power sound waves that can precisely target tumours without surgery.