La Barbara is 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 2 or more pitches simultaneously).
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- ↑ Pool, Jeannie G. (Jan., 1979). "America's Women Composers: Up from the Footnotes", p.35, Music Educators Journal, Vol. 65, No. 5., pp. 28-41. "Joan La Bar-[<br>]bara, a major innovator in her use of voice in both live and taped electronic works."