Joan Linda La Barbara (born June 8, 1947) is an American vocalist and composer known for her explorations of non-conventional or "extended" vocal techniques. Considered to be a vocal virtuoso in the field of contemporary music, she is credited with advancing a new vocabulary of vocal sounds including trills, whispers, cries, sighs, inhaled tones, and multiphonics (singing two or more pitches simultaneously).

From Wikipedia

Wikipedia content provided under the terms of the Creative Commons BY-SA license