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- W1968565718 abstract "The intelligibility of many classes of speech sounds requires the preservation of spectral amplitude patterning in the auditory representation of the signal. In hearing impairment of cochlear origin contrast in spectral amplitude may be reduced: first, suppression may be less effective; second, auditory filters may be more broadly tuned. It is possible in principle to compensate for a reduction of contrast in the auditory spectrum by increasing contrast in the physical spectrum, e.g., by processing the signal to reduce formant bandwidths. Two steady-state noise-excited vowel sounds were synthesized, one similar to a naturally produced whispered vowel, the other with formant bandwidth reduced to 50 Hz. The auditory spectra of both sounds were measured using simultaneous and forward masking, to assess the enhancement due to suppression, in three normal-hearing and three sensorineurally impaired listeners. Little structure was preserved in the auditory spectrum of the vowel with conventional bandwidths above 2.5 kHz. Reducing formant bandwidths increased spectral contrast in both groups of listeners. Where contrast was preserved, it was enhanced by suppression, again in both groups. The ability to enhance the auditory spectrum in the impaired group may have implications for the design of signal-processing hearing aids." @default.
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- W1968565718 date "1984-05-01" @default.
- W1968565718 modified "2023-09-24" @default.
- W1968565718 title "Enhancing spectral contrast in the auditory representation of speech" @default.
- W1968565718 doi "https://doi.org/10.1121/1.2021644" @default.
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