Harmonic singing, also known as overtone singing, is a vocal technique where a singer produces multiple pitches simultaneously. This is achieved by manipulating the shape of the mouth and throat, allowing the singer to emphasize specific overtones while maintaining a fundamental note. It is often associated with traditional music from regions like Mongolia and Tibet. In harmonic singing, the fundamental frequency is the lowest pitch, while the overtones are higher frequencies that resonate above it. This technique creates a rich, layered sound that can be both mesmerizing and meditative. It is used in various musical styles and is appreciated for its unique auditory qualities.