Have you ever heard of polyphonic overtone singing? It's a voice technique where it sounds like one person is singing two notes at the same time. It's pretty amazing.

This woman can make the sound of two notes at once. She makes it seem so easy, you'd think it'd be something she learned as a party trick. But the singer, Anna-Maria Hefele, has been doing this ...

This week's most popular viral videos include a man covered in pug puppies, elephants helping each other out, a cat head over heels for a vacuum cleaner, some trippy polyphonic overtone singing and ...

Overtone singer Stuart Hinds demonstrates his skills at vocalizing two different melodic lines at the same time, as he previews his recital Harmonic Meetings – Chamber Music with Polyphonic Overtone ...

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) ...

"Finally a breath of fresh air in the concert landscape: Layers of Voice turns vocal music completely on its head and impresses with unique innovation paired with vocal virtuosity. A must for ...