Observers adjusted the center pulse of a 3‐tone/pulse series by either increasing or decreasing the frequency to achieve the criterion that the center pulse was heard to occur either first or last. At the beginning of each trial, the frequency of all three pulses was the same. The frequency increase or decrease necessary to achieve the temporal‐order criterion was examined in the frequency range of 500–4000 cps, at pulse durations and intervals in the range from 10 to 80 msec, and for various SPL. The results indicated that the required change in frequency of the center pulse to alter perceived order increased as the test frequency increased and that the values were similar to those for critical bands. The phenomenon was also examined for two‐ and five‐pulse series. For some observers, temporal perception different from actual order was reported. [Research supported by U. S. Aeronautical Systems Division, Wright‐Patterson Air Force Base, under contract AF 33 (615)‐1181.]