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- W2041002495 abstract "This study examines how listeners combine information for level discrimination (aka intensity discrimination) across auditory channels. Individual components’ contributions to listeners’ decisions were measured in a conditional-on-single-stimulus (COSS) paradigm. Stimuli were 7- and 15-tone complexes with components spaced one critical band apart around 1600 Hz. The mean component level was 60 dB SPL for the standard and was increased for the target to obtain 75%–80% correct responses. Results for four normal listeners show that the weights were highest for the two highest-frequency components when all components had equal level increments. Progressively increasing the level increment for components above the center generally had little effect on the weights. This indicates that listeners may be limited to using an optimal selection of channels for the decision. Adding 3-Bark-wide roving-level maskers above and below the complexes had little effect on the weights for the 7-tone complexes, but reduced the weights for the high components of the 15-tone complexes. The masker bands had near-zero weights. Altogether the results indicate that level discrimination depends on information across many auditory channels. Differences in component contributions are unlikely to reflect optimum weighting and are only partly explained by spread of excitation. [Work supported by NIH/NIDCD Grant No. R01DC00187.]" @default.
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- W2041002495 date "2000-05-01" @default.
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- W2041002495 title "Perceptual channel weights for level discrimination" @default.
- W2041002495 doi "https://doi.org/10.1121/1.429097" @default.
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