Biofeedback therapy is a learning process that is based on "operant conditioning" techniques.
Aim: To estimate the significance of biofeedback to an accurate and faster control of singing voice emission.
Results: Significantly, it was discovered that professional singers active in performing of both classical and music theatre repertoire with regard to the visual-kinesthetic effect of melodic contour in musical notation as it affect vocal timbre. The results of the study also indicate that the development of new technology for youth singer vocal training, may be useful to these singers.