Signal Detection as a Function of Frequency Ensemble. II

This paper presents the results of a second experimental investigation of the detection of a signal in noise as a function of signal ensemble size and ensemble frequency range. Data are presented for the three observers who took part in the experiment. The results obtained are compared with (1) predictions based upon three mathematical models, (2) performance expected of a mathematically optimum detector, and (3) results obtained in the first of these investigations.