Investigation of the Precision of an Articulation-Testing Program
Charles W. Stuckey · The Journal of the Acoustical Society of America · 1963
A mathematical model of the individual articulation scores of a team of listeners during their training period was contrasted to a similar model for a fully trained articulation team. Statistical hypotheses of whether or not a particular team had received sufficient training were tested by evaluating the learning process of a team being trained. It was concluded that this procedure of training evaluation is valid and that after 20 hours the team was fully trained in terms of the criterion adopted. The effect of memorization on the articulation scores was evaluated and found to be negligible. The maximum variance of a trained team was found and the precision of the results was computed as a function of the number of repetitions averaged. By averaging the scores from a sufficient number of repetitions, any desired degree of precision could be obtained. The articulation team was found to be a very precise and reliable measuring instrument for ranking voice-communications equipment in terms of intelligibility.