Monaural and between-ear temporal gap detection: I. Single gaps

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Abstract
Temporal gap thresholds were obtained for four signal combinations: monopolar (M) and random-polarity (R) pulse trains; and, presentation of signals before and after a temporal gap to the same (S) ear or to different (D) ears. When a monaural spectral analysis of the signal across the gap is possible (conditon M-S, gap sensitivity improves with longer and longer signals on each side of the gap, with extremely fine temperal gap sensitivity (∠1 μsec). Sensitivity decreases markedly for the other three conditions (∠103-fold for condition R-S; ∠104-fold for condition M-D or R-D). There, gap sensitivity decreases with longer signals about the temporal gap. The poorer sensitivity with longer random-polarity signals for monaural gap detection may be related to greater masking by the longer signals. The poorer sensitivity with longer signals for binaural gap detection may be related to binaural ’’precedence’’ effects. Strong asymmetrical effects upon gap detection were also noted.

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