Abstract
A psychoacoustical facility, built around a small digital computer (Digital PDP-5), is briefly described. In contrast with a previously reported computer-controlled facility [McQuillin et al., J. Acoust. Soc. Am. 34, 1999(A) (1962)], no direct mechanical control of conventional audio generators has been attempted. Instead, the computer is assigned the entire task of carrying out the psychoacoustical experiment. Stimulus generation is presently confined to trains of monopolar pulses with well-defined temporal properties. Interpulse intervals, generated by programmed “delay loops,” provide for temporal differences as small as 0.75 μsec between successive intervals. Several psychophysical procedures have been employed for efficient experimentation. The implementation of sequential sampling procedures permits termination of the psychophysical experiment when the results meet a previously determined criterion of precision. Sample experiments are illustrated. [Research supported by National Science Foundation.]
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