Detection of Known Signals in Arbitrary Backgrounds
Abstract
Psychophysical masking studies examined conditions in which the basic task was the detection of a target sound presented simultaneously with maskers whose component frequencies changed with each presentation. Experiments focused on the important determinants of performance when maskers are randomized. Specific experiments fourm (1) that psychometric functions for individual maskers were extremely shallow relative to slopes under minimal uncertainty, (2) that the masking producted by combinations of broadband noise and multicomponent maskers was greater than that predicted from a linear sum of the effects of each masker alone (3) that the effects of masker uncertainty were greatly reduced or eliminated in forward masking (4) that the large individual differences observed were not reflected in measures of peripheral filter shape, and (5) that masking produced by uncertainty was extremely resistant to change as masker energy was progressively removed from the frequency region around the signal.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1988
- Accession Number
- ADA204076
Entities
People
- Brian P. Callaghan
- Donna L. Neff
- Walt Jesteadt