Abstract
Frequency selectivity in aging listeners with sensorineural hearing impairment was assessed by measuring the width of PTC's and masking patterns. Phonetic identification was assessed by the shape of identification functions for stimuli from five acoustic continua. Three continua were based on cue duration. In another continuum, the location of a steady-state F2 was varied relative to a fixed F1. In yet another continuum, the direction of change of F2 was varied. Preliminary results suggest that phonetic identification was poorest for stimuli cued by changes in F2 transitions. Steady-state formant discrimination was slightly poorer than normal when the F2 of the “different” stimulus was lower in frequency than the “standard” F2 steady state. Phonetic identification was most normal for stimuli cued by changes in stimulus duration. The relationship between these data and frequency selectivity will be discussed.
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