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- W1997158247 abstract "Large amounts of simultaneous masking can be produced by changing the frequency content of multicomponent maskers with each presentation. This experiment tested whether uncertainty in overall level or component levels would also degrade performance, either alone or in combination with frequency uncertainty. The maskers had 5, 10, or 20 components, drawn at random from a 300- to 3000-Hz range, excluding critical band components around the signal frequency of 1000 Hz. The four types of level uncertainty were (1) overall level fixed at 60 dB SPL and component levels equal; (2) overall level randomized by 10 or 20 dB in 5-dB steps and component levels equal; (3) overall level fixed and component levels randomized by 5 or 10 dB in 1-dB steps; and (4) both overall and component levels randomized. Each was tested in combination with two degrees of frequency uncertainty: (1) random samples within trials and (2) random samples between trials. To test level randomization without frequency uncertainty, masker samples were fixed across blocks of trials for conditions 1 and 4. The results showed large (20- to 25-dB) effects of randomizing overall level, both alone and in combination with frequency uncertainty. In contrast, the effects of randomizing componet levels were much smaller and inconsistent across listeners and conditions. [Work supported by AFOSR.]" @default.
- W1997158247 created "2016-06-24" @default.
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- W1997158247 date "1990-05-01" @default.
- W1997158247 modified "2023-09-23" @default.
- W1997158247 title "Relative effects of uncertainty in overall level, component level, and component frequency for multicomponent simultaneous maskers" @default.
- W1997158247 doi "https://doi.org/10.1121/1.2028066" @default.
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