scholarly journals Development and validation of a spectro-temporal processing test for cochlear-implant listeners

2018 ◽  
Vol 144 (5) ◽  
pp. 2983-2997 ◽  
Author(s):  
Alan W. Archer-Boyd ◽  
Rosy V. Southwell ◽  
John M. Deeks ◽  
Richard E. Turner ◽  
Robert P. Carlyon
Keyword(s):  
Cochlear Implant ◽  
Temporal Processing ◽  
Development And Validation

scholarly journals Relationships between speech understanding and temporal processing abilities in cochlear implant patients

1984 ◽  
Vol 76 (S1) ◽  
pp. S48-S48
Author(s):  
Ingeborg J. Hochmair‐Desoyer ◽  
Helmut K. Stiglbrunner ◽  
Ernst‐Ludwig Wallenberg
Keyword(s):  
Cochlear Implant ◽  
Temporal Processing ◽  
Speech Understanding ◽  
Processing Abilities

Shared monaural and binaural temporal processing limits in bilateral cochlear implant listeners

2016 ◽  
Vol 139 (4) ◽  
pp. 2210-2210
Author(s):  
Antje Ihlefeld ◽  
Robert P. Carlyon ◽  
Alan Kan ◽  
Tyler H. Churchill ◽  
Ruth Y. Litovsky
Keyword(s):  
Cochlear Implant ◽  
Temporal Processing ◽  
Bilateral Cochlear Implant

scholarly journals Effect of Chronic Stimulation and Stimulus Level on Temporal Processing by Cochlear Implant Listeners

2018 ◽  
Vol 20 (2) ◽  
pp. 169-185 ◽  
Author(s):  
Robert P. Carlyon ◽  
François Guérit ◽  
Alexander J. Billig ◽  
Yu Chuen Tam ◽  
Frances Harris ◽  
...  
Keyword(s):  
Cochlear Implant ◽  
Temporal Processing ◽  
Stimulus Level ◽  
Chronic Stimulation

scholarly journals Age-Related Temporal Processing Deficits in Word Segments in Adult Cochlear-Implant Users

2019 ◽  
Vol 23 ◽  
pp. 233121651988668 ◽  
Author(s):  
Zilong Xie ◽  
Casey R. Gaskins ◽  
Maureen J. Shader ◽  
Sandra Gordon-Salant ◽  
Samira Anderson ◽  
...  
Keyword(s):  
Cochlear Implant ◽  
Temporal Processing ◽  
Word Identification ◽  
Speech Understanding ◽  
Potential Mechanism ◽  
Auditory Temporal Processing ◽  
Categorization Task ◽  
Performance Differences ◽  
Temporal Cues ◽  
Age Related

Aging may limit speech understanding outcomes in cochlear-implant (CI) users. Here, we examined age-related declines in auditory temporal processing as a potential mechanism that underlies speech understanding deficits associated with aging in CI users. Auditory temporal processing was assessed with a categorization task for the words dish and ditch (i.e., identify each token as the word dish or ditch) on a continuum of speech tokens with varying silence duration (0 to 60 ms) prior to the final fricative. In Experiments 1 and 2, younger CI (YCI), middle-aged CI (MCI), and older CI (OCI) users participated in the categorization task across a range of presentation levels (25 to 85 dB). Relative to YCI, OCI required longer silence durations to identify ditch and exhibited reduced ability to distinguish the words dish and ditch (shallower slopes in the categorization function). Critically, we observed age-related performance differences only at higher presentation levels. This contrasted with findings from normal-hearing listeners in Experiment 3 that demonstrated age-related performance differences independent of presentation level. In summary, aging in CI users appears to degrade the ability to utilize brief temporal cues in word identification, particularly at high levels. Age-specific CI programming may potentially improve clinical outcomes for speech understanding performance by older CI listeners.

scholarly journals Temporal processing in postlingual adult users of cochlear implant

2016 ◽  
Vol 82 (3) ◽  
pp. 304-309 ◽  
Author(s):  
Maycon Duarte ◽  
Amanda Dal Piva Gresele ◽  
Maria Madalena Canina Pinheiro
Keyword(s):  
Cochlear Implant ◽  
Temporal Processing

scholarly journals Effect of chronic stimulation and stimulus level on temporal processing by cochlear implant listeners

2018 ◽  
Author(s):  
Robert P. Carlyon ◽  
François Guérit ◽  
Alexander J. Billig ◽  
Yu Chuen Tam ◽  
Frances Harris ◽  
...  
Keyword(s):  
Cochlear Implant ◽  
Temporal Processing ◽  
Dynamic Range ◽  
Stimulus Level ◽  
Adaptive Procedure ◽  
Direct Stimulation ◽  
Upper Limit ◽  
Upper Limits ◽  
Series Of Experiments ◽  
Rate Discrimination

AbstractA series of experiments investigated potential changes in temporal processing during the months following activation of a cochlear implant (CI) and as a function of stimulus level. Experiment 1 tested patients on the day of implant activation and two and six months later. All stimuli were presented using direct stimulation of a single apical electrode. The dependent variables were rate discrimination ratios (RDRs) for pulse trains with rates centred on 120 pulses per second (pps), obtained using an adaptive procedure, and a measure of the upper limit of temporal pitch, obtained using a pitch-ranking procedure.All stimuli were presented at their most comfortable level (MCL). RDRs decreased from 1.23 to 1.16 and the upper limit increased from 357 to 485 pps from 0 to 2 months post-activation, with no overall change from 2 to 6 months. Because MCLs and hence the testing level increased across sessions, two further experiments investigated whether the performance changes observed across sessions could be due to level differences. Experiment 2 re-tested a subset of subjects at 9 months post-activation, using current levels similar to those used at 0 months. Although the stimuli sounded softer, some subjects showed lower RDRs and/or higher upper limits at this re-test. Experiment 3 measured RDRs and the upper limit for a separate group of subjects at levels equal to 60%, 80%, and 100% of the dynamic range. RDRs decreased with increasing level. The upper limit increased with increasing level for most subjects, with two notable exceptions. Implications of the results for temporal plasticity are discussed, along with possible influences of the effects of level and of across-session learning.

scholarly journals Noise-Induced Change of Cortical Temporal Processing in Cochlear Implant Users

2020 ◽  
Vol 13 (3) ◽  
pp. 241-248 ◽  
Author(s):  
Ji-Hye Han ◽  
Jihyun Lee ◽  
Hyo-Jeong Lee
Keyword(s):  
Speech Perception ◽  
Cochlear Implant ◽  
Temporal Processing ◽  
Auditory Evoked Potentials ◽  
Voice Onset Time ◽  
Signal To Noise Ratio ◽  
Onset Time ◽  
Noise Signal ◽  
Noise Masking ◽  
Cortical Auditory Evoked Potentials

Objectives. Cochlear implant (CI) users typically report impaired ability to understand speech in noise. Speech understanding in CI users decreases with noise due to reduced temporal processing ability, and speech perceptual errors involve stop consonants distinguished by voice onset time (VOT). The current study examined the effects of noise on various speech perception tests while at the same time used cortical auditory evoked potentials (CAEPs) to quantify the change of neural processing of speech sounds caused by noise. We hypothesized that the noise effects on VOT processing can be reflected in N1/P2 measures, the neural changes relate to behavioral speech perception performances.Methods. Ten adult CI users and 15 normal-hearing (NH) people participated in this study. CAEPs were recorded from 64 scalp electrodes in both quiet and noise (signal-to-noise ratio +5 dB) and in passive and active (requiring consonant discrimination) listening. Speech stimulus was synthesized consonant-vowels with VOTs of 0 and 50 ms. N1-P2 amplitudes and latencies were analyzed as a function of listening condition. For the active condition, the P3b also was analyzed. Behavioral measures included a variety of speech perception tasks.Results. For good performing CI users, performance in most speech test was lower in the presence of noise masking. N1 and P2 latencies became prolonged with noise masking. The P3b amplitudes were smaller in CI groups compared to NH. The degree of P2 latency change (0 vs. 50 ms VOT) was correlated with consonant perception in noise.Conclusion. The effects of noise masking on temporal processing can be reflected in cortical responses in CI users. N1/P2 latencies were more sensitive to noise masking than amplitude measures. Additionally, P2 responses appear to have a better relationship to speech perception in CI users compared to N1.

Sign in / Sign up

Export Citation Format

Share Document