 The study found that auditory detection of frequency modulation, FM, for low FM rates depended on the use of both temporal, phase locking, and place cues, depending on the carrier frequency, while detection of FM at high rates depended primarily on the use of place cues. The study also found that FM thresholds were better for the 2, than for the 20 Hz rate for center frequencies up to 4 kHz, while the reverse was true for higher center frequencies. For both FM rates, the thresholds, expressed as a proportion of the center frequency, were roughly constant for center frequencies from 6 to 10 Hz, consistent with the use of place cues. For the task involving detection of changes in the temporal fine structure, TFS, a bandpass-filtered complex tones, thresholds worsen progressively with increasing frequency above 4 kHz, consistent with the weakening of temporal cues. This article was offered by Brian C. J. Moore, Unvine.