Masked thresholds for a 1000‐Hz sinusoidal signal were measured as a function of masker level in both forward and simultaneous masking for two types of maskers: a 1000‐Hz sinusoid and a narrowband noise, 60‐Hz wide, centered at 1000 Hz. In forward masking, the noise masker produced much steeper growth‐of‐masking functions than the sinusoid. Presenting a contralateral broadband noise ‘‘cue’’ with the forward masker dramatically reduced the slope of masking for the noise masker but did not influence results for the sinusoidal masker. The noise remained the more effective masker. The amount of masking produced by combinations of equally effective narrowband‐noise and sinusoidal maskers was compared to that produced by each masker individually with and without the contralateral cue. No additional masking beyond that predicted by energy summation was measured for forward masking. Additional masking beyond energy‐sum predictions was measured for analogous conditions in simultaneous masking. Comparisons of results obtained with and without the contralateral cue suggest that signal thresholds in the presence of narrowband‐noise forward maskers can reflect nonperipheral auditory processes.
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December 1983
December 01 1983
Additivity of forward masking
Donna L. Neff;
Donna L. Neff
The Boys Town National Institute for Communication Disorders in Children, 555 North 30th Street, Omaha, Nebraska 68131
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Walt Jesteadt
Walt Jesteadt
The Boys Town National Institute for Communication Disorders in Children, 555 North 30th Street, Omaha, Nebraska 68131
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J. Acoust. Soc. Am. 74, 1695–1701 (1983)
Article history
Received:
March 25 1983
Accepted:
August 24 1983
Citation
Donna L. Neff, Walt Jesteadt; Additivity of forward masking. J. Acoust. Soc. Am. 1 December 1983; 74 (6): 1695–1701. https://doi.org/10.1121/1.390277
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