VARIATION OF ELECTROLARYNGOGRAPHICALLY DERIVED CLOSED QUOTIENT FOR TRAINED AND UNTRAINED ADULT FEMALE SINGERS

The derivation of larynx closed quotient (CQ) measures from the electr olarynogograph output is discussed and data are presented for a group of trained and untrained adult female singers (N = 26) for a sung two- octave G major scale. Statistically significant trends are observed be tween the trained and untrained groups that suggest for the trained gr oup: (a) CQ tends to be lower for pitches below D4 and higher for pitc hes above B4, and (b) the gradient [CQ/log(F0)] tends to correlate pos itively with the number of years singing training/experience. These da ta are compared with those reported previously for an adult male group , and it is suggested that CQ could be a useful parameter to include i n a real-time visual display for singing training.