The goals of the present study were to measure acoustic temporal modulation transfer functions (TMTFs) in cochlear implant listeners and examine the relationship between modulation detection and speech recognition abilities. The effects of automatic gain control, presentation level and number of channels on modulation detection thresholds (MDTs) were examined using the listeners’ clinical sound processor. The general form of the TMTF was low-pass, consistent with previous studies. The operation of automatic gain control had no effect on MDTs when the stimuli were presented at 65 dBA. MDTs were not dependent on the presentation levels (ranging from 50 to 75 dBA) nor on the number of channels. Significant correlations were found between MDTs and speech recognition scores. The rates of decay of the TMTFs were predictive of speech recognition abilities. Spectral-ripple discrimination was evaluated to examine the relationship between temporal and spectral envelope sensitivities. No correlations were found between the two measures, and 56% of the variance in speech recognition was predicted jointly by the two tasks. The present study suggests that temporal modulation detection measured with the sound processor can serve as a useful measure of the ability of clinical sound processing strategies to deliver clinically pertinent temporal information.
REFERENCES
1.
Anderson
, E. S.
, Oxenham
, A. J.
, Kreft
, H.
, Nelson
, P. B.
, and Nelson
, D. A.
(2011
). “Comparing spectral tuning curves, spectral ripple resolution, and speech perception in cochlear implant users
,” J. Acoust. Soc. Am.
(in press).2.
Bacon
, S. P.
, and Viemeister
, N. F.
(1985
). “Temporal modulation transfer functions in normal-hearing and hearing-impaired listeners
,” Audiology
24
, 117
–134
. 3.
Busby
, P. A.
, Tong
, Y. C.
, and Clark
, G. M.
(1993
). “The perception of temporal modulations by cochlear implant patients
,” J. Acoust. Soc. Am.
94
, 124
–131
. 5.
Carlyon
, R. P.
, Deeks
, J. M.
, and McKay
, C. M.
(2010
). “The upper limit of temporal pitch for cochlear-implant listeners: Stimulus duration, conditioner pulses, and the number of electrodes stimulated
,” J. Acoust. Soc. Am.
127
, 1469
–1478
. 6.
Cazals
, Y.
, Pelizzone
, M.
, Saudan
, O.
, and Boex
, C.
(1994
). “Low-pass filtering in amplitude modulation detection associated with vowel and consonant identification in subjects with cochlear implants
,” J. Acoust. Soc. Am.
96
, 2048
–2054
. 7.
Chatterjee
, M.
(2003
). “Modulation masking in cochlear implant listeners: Envelope versus tonotopic components
,” J. Acoust. Soc. Am.
113
, 2042
–2053
. 8.
Chatterjee
, M.
, and Oba
, S. I.
(2004
). “Across- and within-channel envelope interactions in cochlear implant listeners
,” J. Assoc. Res. Otolaryngol.
5
, 360
–375
. 9.
Chatterjee
, M.
, and Yu
, J.
(2010
). “A relation between electrode discrimination and amplitude modulation detection by cochlear implant listeners
,” J. Acoust. Soc. Am.
127
, 415
–426
. 10.
Donaldson
, G. S.
, and Viemeister
, N. F.
(2000
). “Intensity discrimination and detection of amplitude modulation in electric hearing
,” J. Acoust. Soc. Am.
108
, 760
–763
. 11.
Eddins
, D. A.
(1993
). “Amplitude modulation detection of narrow-band noise: Effects of absolute bandwidth and frequency region
,” J. Acoust. Soc. Am.
93
, 470
–479
. 12.
Firszt
, J. B.
(2003
). HiResolutionTM Sound Processing
(Advanced Bionics, LLC
, Valencia, CA
).13.
Fu
, Q. J.
, Zeng
, F. G.
, Shannon
, R. V.
, and Soli
, S. D.
(1998
). “Importance of tonal envelope cues in Chinese speech recognition
,” J. Acoust. Soc. Am.
104
, 505
–510
. 14.
Fu
, Q. J.
, and Shannon
, R. V.
(2000
). “Effect of stimulation rate on phoneme recognition by nucleus-22 cochlear implant listeners
,” J. Acoust. Soc. Am.
107
, 589
–597
. 15.
Fu
, Q. J.
, and Zeng
, F. G.
(2000
). “Identification of temporal envelope cues in Chineses tone recognition
,” Asia Pac. J. Speech Lang. Hear.
5
, 45
–57
.16.
Fu
, Q. J.
(2002
). “Temporal processing and speech recognition in cochlear implant users
,” Neuroreport
13
, 1635
–1639
. 17.
Fu
, Q. J.
, Chinchilla
, S.
, and Galvin
, J. J.
(2004
). “The role of spectral and temporal cues in voice gender discrimination by normal-hearing listeners and cochlear implant users
,” J. Assoc. Res. Otolaryngol.
5
, 253
–260
. 18.
Galvin
, J. J.
, III, and Fu
, Q. J.
(2005
). “Effects of stimulation rate, mode and level on modulation detection by cochlear implant users
,” J. Assoc. Res. Otolaryngol.
6
, 269
–279
. 19.
Galvin
, J. J.
, III, and Fu
, Q. J.
(2009
). “Influence of stimulation rate and loudness growth on modulation detection and intensity discrimination in cochlear implant users
,” Hear. Res.
250
, 46
–54
. 20.
Grose
, J. H.
Hall
, J. W.
, and Gibbs
, C.
(1993
). “Temporal analysis in children
,” J. Speech. Hear. Res.
36
, 351
–356
.21.
Hall
, J. W.
, and Grose
, J. H.
(1994
). “Development of temporal resolution in children as measured by the temporal modulation transfer functions
,” J. Acoust. Soc. Am.
96
, 150
–154
. 22.
Harris
, R. W.
(1991
). Speech Audiometry Materials Compact Disk
(Brigham Young University
, Provo, UT
).45.
Henry
, B. A.
, and Turner
, C. W.
(2003
). “The resolution of complex spectral patterns by cochlear implant and normal-hearing listeners
,” J. Acoust. Soc. Am.
113
, 2861
–2873
. 23.
Henry
, B. A.
, Turner
, C. W.
, and Behrens
, A.
(2005
). “Spectral peak resolution and speech recognition in quiet: normal hearing, hearing impaired, and cochlear implant listeners
,” J. Acoust. Soc. Am.
118
, 1111
–1121
. 24.
Levitt
, H.
(1971
). “Transformed up-down methods in psychoacoustics
,” J. Acoust. Soc. Am.
49
, 467
–477
. 46.
Litvak
, L. M.
, Spahr
, A. J.
, Saoji
, A. A.
, and Fridman
, G. Y.
(2007
). “Relationship between perception of spectral ripple and speech recognition in cochlear implant and vocoder listeners
,” J. Acoust. Soc. Am.
122
, 982
–991
. 25.
Lomax
, R. G.
(2005
). Statistical Concepts: A Second Course
(Lawrence Erlbaum Associates
, Mahwah, NJ
).26.
Luo
, X.
, Fu
, Q. J.
, Wei
, C. G.
, and Cao
, K. L.
(2008
). “Speech recognition and temporal amplitude modulation processing by Mandarin-speaking cochlear implant users
,” Ear Hear.
29
, 957
–970
. 27.
Luo
, X.
, Galvin
, J. J.
, and Fu
, Q. J
. (2010
). “Effects of stimulus duration on amplitude modulation processing with cochlear implants
,” J. Acoust. Soc. Am.
127
, EL23
–EL29
.28.
McKay
, C. M.
, Henshall
, K. R.
, and Hull
, A. E.
(2005
). “The effect of rate of stimulation on perception of spectral shape by cochlear implantees
,” J. Acoust. Soc. Am.
118
, 386
–392
. 29.
McKay
, C. M.
, and Henshall
, K. R.
(2010
). “Amplitude modulation and loudness in cochlear implantees
,” J. Assoc. Res. Otolaryngol.
11
, 101
–111
. 30.
Moore
, B. C. J.
, Glasberg
, B. R.
, Stone
, M. A.
(1991
). “Optimization of a slow-acting automatic gain control system for us in hearing aids
,” Br. J. Audiol.
25
, 171
–182
. 31.
Peterson
, G. E.
, and Lehiste
, I.
(1962
). “Revised CNC lists for auditory tests
,” J. Speech Hear. Disord.
27
, 62
–70
.32.
Pfingst
, B. E.
, Xu
, L.
, and Thompson
, C. S.
(2007
). “Effects of carrier pulse rate and stimulation site on modulation detection by subjects with cochlear implants
,” J. Acoust. Soc. Am.
121
, 2236
–2246
. 33.
Pfingst
, B. E.
, Burkholder-Juhasz
, R. A.
, Xu
, L.
, and Thompson
, C. S.
(2008
). “Across-site patterns of modulation detection in listeners with cochlear implants
,” J. Acoust. Soc. Am.
123
, 1054
–1062
. 34.
Richardson
, L. M.
, Busby
, P. A.
, and Clark
, G. M.
(1998
). “Modulation detection interference in cochlear implant subjects
,” J. Acoust. Soc. Am.
104
, 442
–452
. 35.
Saoji
, A. A.
, Litvak
, L. M.
, Spahr
, A. J.
, and Eddins
, D. A.
(2009
). “Spectral modulation detection and vowel and consonant identifications in cochlear implant listeners
,” J. Acoust. Soc. Am.
126
, 955
–958
. 36.
Shannon
, R. V.
(1992
). “Temporal modulation transfer functions in patients with cochlear implants
,” J. Acoust. Soc. Am.
91
, 2156
–2164
. 37.
Turner
, C. W.
, Gantz
, B. J.
, Vidal
, C.
, Behrens
, A.
, and Henry
, B. A.
(2004
). “Speech recognition in noise for cochlear implant listeners: benefits of residual acoustic hearing
,” J. Acoust. Soc. Am.
115
, 1729
–1735
. 38.
Van Tasell
, D. J.
, Soli
, S. D.
, Kirby
, V. M.
, and Widin
, G. P.
(1987
). “Speech waveform envelope cues for consonant recognition
,” J. Acoust. Soc. Am.
82
, 1152
–1161
. 39.
Viemeister
, N. F.
(1979
). “Temporal modulation transfer functions based upon modulation thresholds
,” J. Acoust. Soc. Am.
66
, 1364
–1380
. 40.
Wei
, C.
, Cao
, K.
, Jin
, X.
, Chen
, X.
, and Zeng
, F. G.
(2007
). “Psychophysical performance and Mandarin tone recognition in noise by cochlear implant users
,” Ear Hear.
28
, 62S
–65S
. 41.
Won
, J. H.
, Drennan
, W. R.
, and Rubinstein
, J. T.
(2007
). “Spectral-ripple resolution correlates with speech reception in noise in cochlear implant users
,” J. Assoc. Res. Otolaryngol.
8
, 384
–392
. 42.
Won
, J. H.
, Drennan
, W. R.
, Kang
, R. S.
, and Rubinstein
, J. T.
(2010
). “Psychoacoustic abilities associated with music perception in cochlear implant users
,” Ear Hear.
31
, 796
–805
. 43.
Xu
, L.
, Tsai
, Y.
, and Pfingst
, B. E.
(2002
). “Features of stimulation affecting tonal-speech perception: Implications for cochlear prostheses
,” J. Acoust. Soc. Am.
112
, 247
–258
. 44.
Xu
, L.
, Thompson
, C. S.
, and Pfingst
, B. E.
(2005
). “Relative contributions of spectral and temporal cues for phoneme recognition
,” J. Acoust. Soc. Am.
117
, 3255
–3267
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