title: Discrimination of time-reversed harmonic complexes by normal-hearing and hearing-impaired listeners.
abstract: Normal-hearing (NH) listeners and hearing-impaired (HI) listeners detected and discriminated time-reversed harmonic complexes constructed of equal-amplitude harmonic components with fundamental frequencies (F0s) ranging from 50 to 800 Hz. Component starting phases were selected according to the positive and negative Schroeder-phase algorithms to produce within-period frequency sweeps with relatively flat temporal envelopes. Detection thresholds were not affected by component starting phases for either group of listeners. At presentation levels of 80 dB SPL, NH listeners could discriminate the two waveforms nearly perfectly when the F0s were less than 300-400 Hz but fell to chance performance for higher F0s. HI listeners performed significantly poorer, with reduced discrimination at several of the F0s. In contrast, at a lower presentation level meant to nearly equate sensation levels for the two groups, NH listeners' discrimination was poorer than HI listeners at most F0s. Roving presentation levels had little effect on performance by NH listeners but reduced performance by HI listeners. The differential impact of roving level suggests a weaker perception of timbre differences and a greater susceptibility to the detrimental effects of experimental uncertainty in HI listeners.
authors.affiliation: Army Audiology and Speech Center, Walter Reed Army Medical Center, Washington, DC, 20307-5001, USA. alauer2@jhmi.edu
authors.forename: Amanda M
authors.initials: AM
authors.lastname: Lauer
authors.forename: Michelle
authors.initials: M
authors.lastname: Molis
authors.forename: Marjorie R
authors.initials: MR
authors.lastname: Leek
mesh_terms: D000161:Acoustic Stimulation / Q000379:methods*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000465:Algorithms; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold; D003638:Deafness / Q000503:physiopathology*; D004192:Discrimination, Psychological; D006309:Hearing; D006801:Humans; D008144:Loudness Perception; D008875:Middle Aged; D010470:Perceptual Masking; D013997:Time Factors
references.citation: J Acoust Soc Am. 1997 Jun;101(6):3648-57
references.pmid: 9193052
references.citation: J Acoust Soc Am. 2000 Mar;107(3):1737-44
references.pmid: 10738825
references.citation: Hear Res. 2001 Aug;158(1-2):71-83
references.pmid: 11506939
references.citation: Ear Hear. 1997 Apr;18(2):89-99
references.pmid: 9099558
references.citation: J Acoust Soc Am. 2007 Feb;121(2):1028-39
references.pmid: 17348525
references.citation: J Acoust Soc Am. 2005 Apr;117(4 Pt 1):2169-80
references.pmid: 15898658
references.citation: J Acoust Soc Am. 2004 Oct;116(4 Pt 1):2248-57
references.pmid: 15532656
references.citation: Proc Natl Acad Sci U S A. 2006 Dec 5;103(49):18866-9
references.pmid: 17116863
references.citation: J Assoc Res Otolaryngol. 2002 Jun;3(2):107-19
references.pmid: 12162362
references.citation: J Acoust Soc Am. 2009 Jan;125(1):27-30
references.pmid: 19173391
references.citation: Hear Res. 1990 Aug 1;47(1-2):103-38
references.pmid: 2228789
references.citation: Hear Res. 2005 Apr;202(1-2):1-12
references.pmid: 15811693
references.citation: Int J Audiol. 2009 Apr;48(4):161-71
references.pmid: 19085395
references.citation: J Acoust Soc Am. 1982 Sep;72(3):761-5
references.pmid: 7130534
references.citation: J Speech Hear Res. 1976 Jun;19(2):357-70
references.pmid: 979204
references.citation: J Acoust Soc Am. 1998 Aug;104(2 Pt 1):1051-60
references.pmid: 9714924
references.citation: J Acoust Soc Am. 1976 Nov;60(5):1176-86
references.pmid: 977844
references.citation: J Acoust Soc Am. 1987 May;81(5):1546-56
references.pmid: 3584692
references.citation: J Acoust Soc Am. 1971 Feb;49(2):Suppl 2:467+
references.pmid: 5541744
references.citation: J Acoust Soc Am. 2008 Feb;123(2):1140-53
references.pmid: 18247914
references.citation: J Acoust Soc Am. 1986 Apr;79(4):1020-33
references.pmid: 3700857
references.citation: J Acoust Soc Am. 2007 Aug;122(2):1055-68
references.pmid: 17672653
references.citation: J Acoust Soc Am. 2001 Jun;109(6):2955-63
references.pmid: 11425137
references.citation: J Assoc Res Otolaryngol. 2008 Dec;9(4):399-406
references.pmid: 18855069
references.citation: J Acoust Soc Am. 1982 Sep;72(3):740-52
references.pmid: 7130532
references.citation: J Acoust Soc Am. 1986 Dec;80(6):1631-7
references.pmid: 3794068
references.citation: J Acoust Soc Am. 2006 Feb;119(2):1251-9
references.pmid: 16521786
references.citation: Ear Hear. 1987 Oct;8(5):277-82
references.pmid: 3678641
references.citation: Hear Res. 1998 Apr;118(1-2):139-50
references.pmid: 9606069
references.citation: J Acoust Soc Am. 1988 Jul;84(1):166-71
references.pmid: 3411044
references.citation: Hear Res. 1997 Apr;106(1-2):95-104
references.pmid: 9112109
references.citation: J Assoc Res Otolaryngol. 2001 Dec;2(4):408-22
references.pmid: 11833613
references.citation: Hear Res. 2006 Dec;222(1-2):16-27
references.pmid: 17030477
references.citation: Hear Res. 2007 Jan;223(1-2):114-21
references.pmid: 17157462
references.citation: J Speech Hear Res. 1984 Sep;27(3):449-55
references.pmid: 6482414
references.citation: Audiology. 1981;20(3):234-43
references.pmid: 7213208
references.citation: J Acoust Soc Am. 2001 Dec;110(6):3169-78
references.pmid: 11785818
references.citation: J Acoust Soc Am. 2000 Nov;108(5 Pt 1):2281-98
references.pmid: 11108369
references.citation: J Acoust Soc Am. 1995 Dec;98(6):3140-5
references.pmid: 8550939
references.citation: J Acoust Soc Am. 1982 Apr;71(4):967-74
references.pmid: 7085985
references.citation: J Acoust Soc Am. 1987 Jan;81(1):133-7
references.pmid: 3819171
references.citation: J Acoust Soc Am. 2002 Aug;112(2):748-59
references.pmid: 12186054
references.citation: Ear Hear. 2005 Apr;26(2):109-19
references.pmid: 15809539
references.citation: J Acoust Soc Am. 1995 Mar;97(3):1817-29
references.pmid: 7699163
references.citation: J Acoust Soc Am. 2007 Dec;122(6):3615-27
references.pmid: 18247769
references.citation: J Acoust Soc Am. 2003 Jul;114(1):294-306
references.pmid: 12880042
references.citation: Ear Hear. 2004 Jun;25(3):242-50
references.pmid: 15179115
references.citation: J Assoc Res Otolaryngol. 2008 Mar;9(1):138-49
references.pmid: 18066624
references.citation: J Acoust Soc Am. 1973 Dec;54(6):1471-88
references.pmid: 4780801
references.citation: Percept Psychophys. 1989 May;45(5):417-26
references.pmid: 2726404
references.citation: J Acoust Soc Am. 2002 Mar;111(3):1389-98
references.pmid: 11931316