title: Central auditory masking by an illusory tone.
abstract: Many natural sounds fluctuate over time. The detectability of sounds in a sequence can be reduced by prior stimulation in a process known as forward masking. Forward masking is thought to reflect neural adaptation or neural persistence in the auditory nervous system, but it has been unclear where in the auditory pathway this processing occurs. To address this issue, the present study used a "Huggins pitch" stimulus, the perceptual effects of which depend on central auditory processing. Huggins pitch is an illusory tonal sensation produced when the same noise is presented to the two ears except for a narrow frequency band that is different (decorrelated) between the ears. The pitch sensation depends on the combination of the inputs to the two ears, a process that first occurs at the level of the superior olivary complex in the brainstem. Here it is shown that a Huggins pitch stimulus produces more forward masking in the frequency region of the decorrelation than a noise stimulus identical to the Huggins-pitch stimulus except with perfect correlation between the ears. This stimulus has a peripheral neural representation that is identical to that of the Huggins-pitch stimulus. The results show that processing in, or central to, the superior olivary complex can contribute to forward masking in human listeners.
authors.affiliation: School of Psychological Sciences, University of Manchester, Manchester, United Kingdom.
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Plack
authors.forename: Andrew J
authors.initials: AJ
authors.lastname: Oxenham
authors.forename: Heather A
authors.initials: HA
authors.lastname: Kreft
authors.forename: Robert P
authors.initials: RP
authors.lastname: Carlyon
mesh_terms: D000161:Acoustic Stimulation; D006801:Humans; D007088:Illusions / Q000502:physiology*; D009622:Noise; D010898:Pitch Perception / Q000502:physiology*
references.citation: J Comp Physiol Psychol. 1948 Feb;41(1):35-9
references.pmid: 18904764
references.citation: J Acoust Soc Am. 1988 Aug;84(2):584-91
references.pmid: 3170950
references.citation: J Acoust Soc Am. 1971 Feb;49(2):Suppl 2:467+
references.pmid: 5541744
references.citation: J Acoust Soc Am. 1977 Feb;61(2):525-33
references.pmid: 845314
references.citation: J Acoust Soc Am. 1972 Apr;51(4):1365-7
references.pmid: 5032953
references.citation: Proc Natl Acad Sci U S A. 2006 Dec 5;103(49):18866-9
references.pmid: 17116863
references.citation: Biophys J. 2011 Apr 6;100(7):1627-34
references.pmid: 21463575
references.citation: J Acoust Soc Am. 1973 Dec;54(6):1458-70
references.pmid: 4780800
references.citation: J Assoc Res Otolaryngol. 2011 Apr;12(2):253-60
references.pmid: 21086147
references.citation: J Acoust Soc Am. 1998 Jun;103(6):3509-26
references.pmid: 9637035
references.citation: Trends Cogn Sci. 2004 Oct;8(10):465-71
references.pmid: 15450511
references.citation: J Acoust Soc Am. 1986 May;79(5):1519-29
references.pmid: 3711451
references.citation: J Acoust Soc Am. 1973 Dec;54(6):1471-88
references.pmid: 4780801
references.citation: J Acoust Soc Am. 2011 Feb;129(2):907-19
references.pmid: 21361448
references.citation: Cereb Cortex. 2009 Mar;19(3):576-85
references.pmid: 18603609
references.citation: J Physiol. 2006 Oct 1;576(Pt 1):49-54
references.pmid: 16901947
references.citation: J Acoust Soc Am. 1982 Oct;72(4):1171-7
references.pmid: 7142581
references.citation: Hear Res. 1988 Jan;32(1):65-79
references.pmid: 3350775
references.citation: J Acoust Soc Am. 1977 May;61(5):1376-9
references.pmid: 881490
references.citation: J Acoust Soc Am. 2011 Jan;129(1):1-4
references.pmid: 21302981
references.citation: J Acoust Soc Am. 2001 Feb;109(2):732-41
references.pmid: 11248977
references.citation: Neuroimage. 2010 Jan 15;49(2):1641-9
references.pmid: 19782757
references.citation: Neuroreport. 2005 Feb 8;16(2):193-6
references.pmid: 15671876
references.citation: J Neurosci. 2009 Feb 25;29(8):2553-62
references.pmid: 19244530
references.citation: J Neurosci. 2006 Aug 23;26(34):8767-73
references.pmid: 16928865
references.citation: J Assoc Res Otolaryngol. 2010 Sep;11(3):477-94
references.pmid: 20369270
references.citation: Hear Res. 2006 Feb;212(1-2):176-84
references.pmid: 16458460
references.citation: Neuroscience. 2008 Jun 12;154(1):370-80
references.pmid: 18384971
references.citation: J Neurosurg. 2002 Jun;96(6):1063-71
references.pmid: 12066908
references.citation: J Acoust Soc Am. 1987 Apr;81(4):1110-7
references.pmid: 3571728
references.citation: Cereb Cortex. 2006 Jun;16(6):835-48
references.pmid: 16151180
references.citation: J Acoust Soc Am. 1992 Jan;91(1):327-35
references.pmid: 1737881
references.citation: J Acoust Soc Am. 2006 May;119(5 Pt 1):2889-904
references.pmid: 16708947