... German singer Anne-Maria Hefele has
been training her voice since 2005 to become
an polyphonic overtone singer.
This means that she is capable of singing different
scales of low notes (fundamentals) and high
pitched notes (overtones) at the same time
producing an otherworldly sound that
gave me goosebumps.
Interested ....
Polyphonic Overtone Singing - Anna-Maria Hefele
Polyphonic Overtone Singing - Anna-Maria Hefele