scholarly journals Effects of electrode configuration on cochlear implant modulation detection thresholds

2011 ◽  
Vol 129 (6) ◽  
pp. 3908-3915 ◽  
Author(s):  
Bryan E. Pfingst
Keyword(s):  
Cochlear Implant ◽  
Electrode Configuration ◽  
Detection Thresholds ◽  
Modulation Detection

Effects of amplitude compression on first- and second-order modulation detection thresholds in cochlear implant listeners

2004 ◽  
Vol 43 (5) ◽  
pp. 264-270 ◽  
Author(s):  
Christian Lorenzi ◽  
Jérome Sibellas ◽  
Christian Füllgrabe ◽  
Stéphane Gallégo ◽  
Claude Fugain ◽  
...  
Keyword(s):  
Cochlear Implant ◽  
Second Order ◽  
Detection Thresholds ◽  
Amplitude Compression ◽  
Modulation Detection

Rate modulation detection thresholds for cochlear implant users

2018 ◽  
Vol 143 (2) ◽  
pp. 1214-1222 ◽  
Author(s):  
Tim Brochier ◽  
Colette McKay ◽  
Hugh McDermott
Keyword(s):  
Cochlear Implant ◽  
Detection Thresholds ◽  
Rate Modulation ◽  
Modulation Detection

scholarly journals Evaluation of Cochlear Implant Candidates using a Non-linguistic Spectrotemporal Modulation Detection Test

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Ji Eun Choi ◽  
Sung Hwa Hong ◽  
Jong Ho Won ◽  
Hee-Sung Park ◽  
Young Sang Cho ◽  
...  
Keyword(s):  
Cochlear Implant ◽  
Modulation Detection

scholarly journals How Do Age and Hearing Loss Impact Spectral Envelope Perception?

2018 ◽  
Vol 61 (9) ◽  
pp. 2376-2385 ◽  
Author(s):  
Erol J. Ozmeral ◽  
Ann C. Eddins ◽  
David A. Eddins
Keyword(s):  
Hearing Loss ◽  
Spectral Resolution ◽  
Modulation Frequency ◽  
Normal Hearing ◽  
Frequency Resolution ◽  
Spectral Envelope ◽  
Detection Thresholds ◽  
Spectral Modulation ◽  
Modulation Detection ◽  
Moderate Hearing Loss

Purpose The goal was to evaluate the potential effects of increasing hearing loss and advancing age on spectral envelope perception. Method Spectral modulation detection was measured as a function of spectral modulation frequency from 0.5 to 8.0 cycles/octave. The spectral modulation task involved discrimination of a noise carrier (3 octaves wide from 400 to 3200 Hz) with a flat spectral envelope from a noise having a sinusoidal spectral envelope across a logarithmic audio frequency scale. Spectral modulation transfer functions (SMTFs; modulation threshold vs. modulation frequency) were computed and compared 4 listener groups: young normal hearing, older normal hearing, older with mild hearing loss, and older with moderate hearing loss. Estimates of the internal spectral contrast were obtained by computing excitation patterns. Results SMTFs for young listeners with normal hearing were bandpass with a minimum modulation detection threshold at 2 cycles/octave, and older listeners with normal hearing were remarkably similar to those of the young listeners. SMTFs for older listeners with mild and moderate hearing loss had a low-pass rather than a bandpass shape. Excitation patterns revealed that limited spectral resolution dictated modulation detection thresholds at high but not low spectral modulation frequencies. Even when factoring out (presumed) differences in frequency resolution among groups, the spectral envelope perception was worse for the group with moderate hearing loss than the other 3 groups. Conclusions The spectral envelope perception as measured by spectral modulation detection thresholds is compromised by hearing loss at higher spectral modulation frequencies, consistent with predictions of reduced spectral resolution known to accompany sensorineural hearing loss. Spectral envelope perception is not negatively impacted by advancing age at any spectral modulation frequency between 0.5 and 8.0 cycles/octave.

Modulation detection thresholds for cochlear implants: Dependence on stimulation site and stimulus level

2006 ◽  
Vol 120 (5) ◽  
pp. 3342-3342 ◽  
Author(s):  
Bryan E. Pfingst ◽  
Rose A. Burkholder ◽  
Catherine S. Thompson ◽  
Li Xu
Keyword(s):  
Cochlear Implants ◽  
Stimulus Level ◽  
Stimulation Site ◽  
Detection Thresholds ◽  
Modulation Detection

Performance of Some of the Better Cochlear-Implant Patients

1989 ◽  
Vol 32 (4) ◽  
pp. 887-911 ◽  
Author(s):  
Richard S. Tyler ◽  
Brian C. J. Moore ◽  
Francis K. Kuk
Keyword(s):  
Word Recognition ◽  
Cochlear Implant ◽  
Scaling Analysis ◽  
Gap Detection ◽  
Environmental Sound ◽  
Sound Perception ◽  
Detection Thresholds ◽  
Closed Set ◽  
Open Set ◽  
Wide Range

The main purpose of this study was to provide an independent corroboration of open-set word recognition in some of the better cochlear-implant patients. These included the Chorimac, Nucleus (one group from the U.S.A. and one group from Hannover, Germany), Symbion, Duren/Cologne and 3M/Vienna implants. Three experiments are reported: (1) word recognition in word lists and in sentences; (2) environmental sound perception, and (3) gap detection. On word recognition, the scores of 6 Chorimac patients averaged 2.5% words and 0.7% words in sentences correct in the French tests. In the German tests, the scores averaged 17% words and 10% words in sentences for 10 Duren/Cologne patients, 15% words and 16% words in sentences for 9 3M/Vienna patients, and 10% words and 16% words in sentences (3% to 26%) for 10 Nucleus/Hannover patients. In the English tests, the scores averaged 11% words and 29.6% words in sentences for l0 Nucleus-U.S.A. patients, and 13.7% words and 35.7% words in sentences for the 9 Symbion patients. The ability to recognize recorded environmental sounds was measured with a closed set of 18 sounds. Performance averaged 23% correct for Chorimac patients, 41% correct for 3M/Vienna patients, 44% correct for Nucleus/Hannover patients, 21% correct for Duren/Cologne patients, 58% correct for Nucleus/U.S.A. patients, and 83% correct for Symbion patients. A multidimensional scaling analysis suggested that patients were, in part, utilizing information about the envelope and about the periodic/aperiodic nature of some of the sounds. Gap detection thresholds with a one-octave wide noise centered at 500 Hz varied widely among patients. Typically, patients with gap thresholds less than 40 ms showed a wide range of performance on speech perception tasks, whereas patients with gap-detection thresholds greater than 40 ms showed poor word recognition skills.

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