Gap detection in normal and hearing-impaired listeners

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Abstract
Temporal resolution, estimated by measuring the minimum detectable gap (.DELTA.t ms) separating 2 successive signals, was assessed in 5 normal-hearing and 5 cochlear-impaired [human] listeners. The signals were octave-band noises (400-800 Hz, 800-1600 Hz and 2000-4000 Hz) presented in a background of continuous, broadband notched noise that was applied to eliminate unwanted spectral cues. Temporal resolution in all listeners showed systematic improvement with an increase in octave-band center frequency. Resolution in the hearing-impaired subjects was significantly poorer than normal regardless of whether the comparisons were made at equal sound pressure level or at equal sensation level.

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