Temporal tuning curves for a 1000-Hz, 10-ms, 10-dB SL sinusoidal signal with a 500-, 1000-, or 1500-Hz, 10-ms sinusoidal masker were measured using a 2IFC adaptive procedure. Frequency tuning curves for the 10 dB SL, 1000-Hz signal were also measured for 10- and 500-ms simultaneous maskers. Five normal hearing listeners were employed. The frequency tuning curves for the brief masker were broader than those for the long masker, especially on the high-frequency side of the signal. Marked differences were not found between the temporal tuning curves for the three masker conditions. The implications of these results for relations between auditory frequency and temporal analysis will be discussed.