Discrimination between random signals
Irwin W. Pollack · The Journal of the Acoustical Society of America · 1979
Random polarity pulse trains of two states (plus and minus polarity) and of three states (plus and minus polarity and no change at defined clock intervals) were constructed and presented to listeners within forced-choice discrimination tests. The pulse trains were either of the same average pulse density or were amplitude-compensated for different pulse densities. Since the long-term spectrum of such signals is uniform, the most likely discriminable feature is the short-term spectrum or the temporal patterning of the signals. Successful discrimination is obtained even for pulse trains of extremely high clock frequencies. [Work supported by NSF.]