A single-interval, yes-no, tone-in-noise detection experiment was conducted to measure the proportion of “tone present” responses to each of 25 reproducible noise-alone and tone-plus-noise waveforms under narrowband , wideband , monotic, and diotic stimulus conditions. Proportions of “tone present” responses (estimates of the probabilities of hits and false alarms) were correlated across masker bandwidths and across monotic and diotic conditions. Two categories of models were considered; one based on stimulus energy or neural counts, and another based on temporal structure of the stimulus envelope or neural patterns. Both categories gave significant correlation between decision variables and data. A model based on a weighted combination of energy in multiple critical bands performed best, predicting up to 90% of the variance in the reproducible-noise data. However, since energy-based models are unable to successfully explain detection under a roving-level paradigm without substantial modification, it is argued that other variations of detection models must be considered for future study. Temporal models are resistant to changes in threshold under roving-level conditions, but explained at most only 67% of the variance in the reproducible-noise data.
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.© 2006 Acoustical Society of America.
2006
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