The time course of cochlear gain reduction measured using a more efficient psychophysical technique.
In a previous study it was shown that an on-frequency precursor intended to activate the medial olivocochlear reflex (MOCR) at the signal frequency reduces the gain estimated from growth-of-masking (GOM) functions. This is called the temporal effect (TE). In Expt. 1 a shorter method of measuring this change in gain is established. GOM functions were measured with an on- and off-frequency precursor presented before the masker and signal, and used to estimate Input/Output functions. The change in gain estimated in this way was very similar to that estimated from comparing two points measured with a single fixed masker level on the lower legs of the GOM functions. In Expt. 2, the TE was measured as a function of precursor duration and signal delay. For short precursor durations and short delays the TE increased (buildup) or remained constant as delay increased, then decreased. The TE also increased with precursor duration for the shortest delay. The results were fitted with a model based on the time course of the MOCR. The model fitted the data well, and predicted the buildup. This buildup is not consistent with exponential decay predicted by neural adaptation or persistence of excitation.
Roverud
Elin
E
Department of Speech, Language, and Hearing Sciences, Purdue University, West Lafayette, Indiana 47907-2038, USA. eroverud@purdue.edu
Strickland
Elizabeth A
EA
D000161:Acoustic Stimulation; D000328:Adult; D001301:Audiometry, Pure-Tone; D001306:Auditory Pathways / Q000502:physiology*; D001307:Auditory Perception; D001309:Auditory Threshold; D003051:Cochlea / Q000294:innervation*; D003463:Cues; D006801:Humans; D008875:Middle Aged; D008954:Models, Biological; D009847:Olivary Nucleus / Q000502:physiology*; D017084:Otoacoustic Emissions, Spontaneous; D010470:Perceptual Masking; D011571:Psychoacoustics; D012018:Reflex; D013018:Sound Spectrography; D013997:Time Factors; D055815:Young Adult
Int J Audiol. 2005 Feb;44(2):118-29
15913160
J Acoust Soc Am. 2004 May;115(5 Pt 1):2234-45
15139634
J Acoust Soc Am. 2001 Oct;110(4):2045-64
11681384
Brain Res. 1979 Sep 7;173(1):152-5
487078
J Acoust Soc Am. 1965 Jul;38:132-41
14347604
J Acoust Soc Am. 1980 Feb;67(2):617-27
7358901
J Acoust Soc Am. 2009 Mar;125(3):1595-604
19275317
J Acoust Soc Am. 1989 May;85(5):2005-11
2732381
J Acoust Soc Am. 1991 Mar;89(3):1324-30
2030219
J Neurophysiol. 1993 Dec;70(6):2533-49
8120597
J Assoc Res Otolaryngol. 2001 Mar;2(1):31-40
11545148
Hear Res. 1988 Dec;37(1):29-45
3225230
J Acoust Soc Am. 1989 Jan;85(1):254-61
2921407
J Acoust Soc Am. 1987 Feb;81(2):418-26
3558958
J Acoust Soc Am. 1998 Mar;103(3):1598-608
9514024
J Physiol. 2006 Oct 1;576(Pt 1):49-54
16901947
Hear Res. 1989 Sep;41(2-3):223-35
2808151
J Acoust Soc Am. 1992 May;91(5):2865-71
1629479
Ann Otol Rhinol Laryngol Suppl. 1980 Sep-Oct;89(5 Pt 2):114-20
6786165
J Acoust Soc Am. 1971 Feb;49(2):Suppl 2:467+
5541744
J Acoust Soc Am. 2008 Jun;123(6):4352-7
18537386
J Acoust Soc Am. 2008 Feb;123(2):946-54
18247897
J Acoust Soc Am. 2010 Feb;127(2):955-69
20136218
J Assoc Res Otolaryngol. 2003 Sep;4(3):405-15
14690058
J Acoust Soc Am. 2003 Jul;114(1):322-32
12880044
Hear Res. 1992 Dec;64(1):123-32
1490895
J Acoust Soc Am. 1990 Jun;87(6):2634-42
2373798
J Acoust Soc Am. 1996 Feb;99(2):1059-65
8609289
J Neurosci. 1996 Jan;16(1):325-32
8613799
J Assoc Res Otolaryngol. 2009 Sep;10(3):459-70
19263165
Hear Res. 2010 Sep 1;268(1-2):22-37
20430072
J Acoust Soc Am. 2005 Nov;118(5):3211-7
16334697
J Neurophysiol. 2009 Mar;101(3):1394-406
19118109
J Acoust Soc Am. 2006 May;119(5 Pt 1):2889-904
16708947
J Acoust Soc Am. 2001 May;109(5 Pt 1):2062-73
11386558
Hear Res. 1986;23(3):257-66
3745024
J Acoust Soc Am. 2009 Apr;125(4):2172-81
19354393
J Acoust Soc Am. 1997 Jun;101(6):3666-75
9193054
Hear Res. 2000 Dec;150(1-2):258-66
11077208
J Acoust Soc Am. 2000 Mar;107(3):1589-97
10738812