Ripple density resolution was investigated in normal and hearing-impaired listeners as a function of hearing threshold. When assessed based on distinguishing the test rippled signal from test reference signals, the ripple-density resolution decreased with increasing tonal thresholds, with the rate nearly equal for both narrow-band (2 oct) and wide band (6 oct) signals. For flat reference signals, the rate was much greater for wide-band than for narrow-band signals. The difference between results obtained in the two measurement paradigms results from the roles of spectral and temporal processing.

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