Hearing-impaired listeners benefit less from masker fluctuation when spectral resolution is degraded
Evidence
Consider next the results from the vocoded conditions (lower row of Fig. 3 ). Here, the benefits of frequency selectivity have been reduced by limiting spectral resolution to the 16 vocoder channels. As expected, the MT masker produces very similar results to the GN masker, as both produce very similar outputs from the tone vocoder. The young NH and the age-matched NH groups seem able to take similar advantage of the lack of inherent masker fluctuations in the PT condition. In contrast, the differences between the PT and MT seem less pronounced in the HI listeners; although some differences remain (in contrast to CI users), they are smaller than in the NH listeners. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2186
As expected, the MT masker produces very similar results to the GN masker, as both produce very similar outputs from the tone vocoder. The young NH and the age-matched NH groups seem able to take similar advantage of the lack of inherent masker fluctuations in the PT condition. In contrast, the differences between the PT and MT seem less pronounced in the HI listeners; although some differences remain (in contrast to CI users), they are smaller than in the NH listeners. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2193
The young NH and the age-matched NH groups seem able to take similar advantage of the lack of inherent masker fluctuations in the PT condition. In contrast, the differences between the PT and MT seem less pronounced in the HI listeners; although some differences remain (in contrast to CI users), they are smaller than in the NH listeners. — Dijk, Pim van, Physiology, Psychoacoustics and…, 2186
Categorization
- QUESTION: Does this fluctuation benefit deficit stem from reduced frequency selectivity, audibility, or impaired temporal processing in HI listeners?
- corroborated: 3 independent passages support this claim — Dijk, Pim van, Physiology, Psychoacoustics and…, 2186; Dijk, Pim van, Physiology, Psychoacoustics and…, 2193