Overtone chanting (also known as overtone singing, Tuvan throat singing, harmonic singing, or khoomei) is a voice technique in which one vocalist sings two notes at once. This is done by reinforcing harmonics (either overtones or undertones), whereby the singer alters the resonances produced in the vocal tract. Many find overtone chanting to have a calming, grounding effect.
Healing Sounds explains from both scientific and spiritual perspectives the healing and transformative powers of harmonics. This book includes: • Practical exercises demonstrating how to use sound in healing and meditation, including "Vowels as Mantras" and "Overtoning".
As singer Anne-Maria Hefele states, “overtone singing is a voice technique where one person sings two notes at the same time.” This is accomplished by manipulating the placement of your tongue and the shape of your mouth. Such manipulation produces a low note and a high note.