title: Effects of the selective disruption of within- and across-channel cues to comodulation masking release.
abstract: In many experiments on comodulation masking release (CMR), both across- and within-channel cues may be available. This makes it difficult to determine the mechanisms underlying CMR. The present study compared CMR in a flanking-band (FB) paradigm for a situation in which only across-channel cues were likely to be available [FBs placed distally from the on-frequency band (OFB)] and a situation where both across- and within-channel cues might have been available (proximally spaced FBs, for which larger CMRs have previously been observed). The use of across-channel cues was selectively disrupted using a manipulation of auditory grouping factors, following Dau et al. [J. Acoust. Soc. Am. 125, 2182-2188(2009)] and the use of within-channel cues was selectively disrupted using a manipulation called "OFB reversal," following Goldman et al. [J. Acoust. Soc. Am. 129, 3181-3193 (2011)]. The auditory grouping manipulation eliminated CMR for the distal-FB configuration and reduced CMR for the proximal-FB configuration. This may indicate that across-channel cues are available for proximal FB placement. CMR for the proximal-FB configuration persisted when both manipulations were used together, which suggests that OFB reversal does not entirely eliminate within-channel cues.
authors.affiliation: Department of Experimental Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, England. sag47@cam.ac.uk
authors.forename: Simon A
authors.initials: SA
authors.lastname: Goldman
authors.forename: Thomas
authors.initials: T
authors.lastname: Baer
authors.forename: Brian C J
authors.initials: BC
authors.lastname: Moore
mesh_terms: D000161:Acoustic Stimulation; D000293:Adolescent; D000328:Adult; D001307:Auditory Perception; D001309:Auditory Threshold; D003198:Computer Simulation; D003463:Cues; D004056:Differential Threshold; D005260:Female; D006801:Humans; D008297:Male; D008954:Models, Biological; D009622:Noise; D010470:Perceptual Masking; D017603:Signal Detection, Psychological / Q000502:physiology; D013997:Time Factors