Sound healing, through various techniques and technologies, is the conscious use of the energy of sound to promote wellness in the human system – including the expansion of consciousness. The science on how sound affects us physically is well defined and proven by traditional physics. The science on how sound affects us mentally through brainwave entrainment is also well proven and accepted as we can observe the different brainwave states through an EEG. How sound affects us emotionally is a little less clear, but there is increasing anecdotal evidence of people being dramatically transformed but it. More recently scientists have been turning their attention to how sound affects us at an even deeper level, that of consciousness. This is something that many ancient civilizations and modern indigenous cultures have been doing to access higher levels of consciousness for thousands of years. David Gibson is the President of the Globe Institute, a Sound healing centre based in San Francisco. He is the author of the Guide to Sound Healing, one of the foremost books on how sound affects us physically, mentally, emotionally and spiritually.