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 harmonics or overtones of their voice. The result is a unique sound that can resemble a melody layered over a drone. This practice is often associated with various cultures, particularly in Tuvan throat singing from Mongolia and Siberia. Overtone singing has gained popularity in contemporary music and is used in various genres, showcasing the versatility and richness of the human voice.