Interactions between spectral and temporal processing on speech understanding in cochlear-implant users

2016 ◽  
Vol 139 (4) ◽  
pp. 2042-2042
Author(s):  
Andrew J. Oxenham
Keyword(s):  
Cochlear Implant ◽  
Temporal Processing ◽  
Speech Understanding

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

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 Within-Frequency Temporal Processing and Speech Perception in Cochlear Implant Recipients and Normal Hearing Listeners

2020 ◽  
Author(s):  
Chelsea Blankenship ◽  
Jareen Meinzen-Derr ◽  
Fawen Zhang
Keyword(s):  
Speech Perception ◽  
Correlation Analysis ◽  
Cochlear Implant ◽  
Temporal Resolution ◽  
Temporal Processing ◽  
Gap Detection ◽  
Speech Understanding ◽  
Behavioral Measures ◽  
Speech In Noise ◽  
Noise Test

ABSTRACT Objective: Speech recognition performance among cochlear implant (CI) recipients is highly variable and is influenced by their ability to perceive rapid changes within the acoustic signal (i.e., temporal resolution). A behavioral gap detection test is commonly used to assess temporal processing however it requires active participation, and therefore may be infeasible for young children and individuals with disabilities. Alternatively, cortical auditory evoked potentials (CAEPs) can be elicited by a silent gap embedded in a longer duration stimulus and have been used as an objective measure of temporal resolution. Only a few studies have examined within-frequency gap detection (identical pre- and post-gap frequency), most of which were conducted with normal hearing (NH) individuals and did not include speech perception. The purpose of the study is to evaluate behavioral and electrophysiological measures of within-frequency temporal processing and speech perception in NH and CI recipients. Design: Eleven post-lingually deafened adult CI recipients (n = 15 ears; mean age = 50.4 yrs.) and eleven age- and gender-matched NH individuals (n = 15 ears; mean age = 49.0 yrs.) were recruited. Speech perception was assessed with the CNC word test, AzBio sentence test, and BKB Speech-in-Noise test. Within-frequency (2 kHz pre- and post-gap tone) behavioral gap detection thresholds (GDT) were measured using an adaptive, two-alternative, forced-choice paradigm. Within-frequency CAEPs were measured using four gap duration conditions based on the individual's behavioral GDT including a supra-threshold (GDTx3), threshold (GDT), sub-threshold (GDT/3), and reference (no gap) condition. Mixed effect models examined group differences in speech perception, behavioral GDTs, and CAEP amplitude and latency. Correlation analyses examined the relationship between the CAEP response, behavioral measures of speech perception and temporal processing, and demographic factors. Results: CI recipients had significantly poorer speech perception scores with no significant differences in behavioral within-frequency GDTs compared to NH participants. CI recipients had poorer CAEP waveform morphology, smaller N1, larger P2 amplitude, and increased P1 latency compared to NH participants. Additionally, older participants displayed smaller N1-P2 amplitude compared to younger participants. Bivariate group correlation analysis showed that individuals with poorer within-frequency GDTs displayed significantly poorer performance on the AzBio sentences in noise and BKB Speech-in-Noise test. Multivariate canonical correlation analysis showed a significant relationship between the within-frequency CAEP amplitude and latency and behavioral measures of speech perception and temporal processing. Conclusions: CI recipients had poorer speech understanding in quiet and noise yet similar behavioral GDTs compared to NH participants. NH participants showed the anticipated trend of increased N1-P2 amplitude as CAEP gap duration increased. However, CAEP amplitude and latency remained relatively stable across gap duration conditions for CI recipients. Instead, significant group and age effects for CAEP peak amplitude and latency were found that can likely be attributed to differences in cortical neuron density, adaptation, and recovery between the groups. Lastly correlation analysis indicates that individuals with poorer temporal processing are likely to have adequate speech perception in quiet but worse speech understanding in noise.

AzBio Speech Understanding Performance in Quiet and Noise in High Performing Cochlear Implant Users

2018 ◽  
Vol 39 (5) ◽  
pp. 571-575 ◽  
Author(s):  
Jason A. Brant ◽  
Steven J. Eliades ◽  
Hannah Kaufman ◽  
Jinbo Chen ◽  
Michael J. Ruckenstein
Keyword(s):  
Cochlear Implant ◽  
Speech Understanding ◽  
High Performing

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 Neural envelope tracking as a measure of speech understanding in cochlear implant users

2018 ◽  
Author(s):  
Eline Verschueren ◽  
Ben Somers ◽  
Tom Francart
Keyword(s):  
Cochlear Implant ◽  
Cochlear Implants ◽  
Closed Loop ◽  
Objective Measure ◽  
Speech Understanding ◽  
Envelope Tracking ◽  
Actual Speech ◽  
Speech Envelope ◽  
Electroencephalogram Eeg ◽  
Automatic Fitting

ABSTRACTThe speech envelope is essential for speech understanding and can be reconstructed from the electroencephalogram (EEG) recorded while listening to running speech. This so-called neural envelope tracking has been shown to relate to speech understanding in normal hearing listeners, but has barely been investigated in persons wearing cochlear implants (CI). We investigated the relation between speech understanding and neural envelope tracking in CI users.EEG was recorded in 8 CI users while they listened to a story. Speech understanding was varied by changing the intensity of the presented speech. The speech envelope was reconstructed from the EEG using a linear decoder and then correlated with the envelope of the speech stimulus as a measure of neural envelope tracking which was compared to actual speech understanding.This study showed that neural envelope tracking increased with increasing speech understanding in every participant. Furthermore behaviorally measured speech understanding was correlated with participant specific neural envelope tracking results indicating the potential of neural envelope tracking as an objective measure of speech understanding in CI users. This could enable objective and automatic fitting of CIs and pave the way towards closed-loop CIs that adjust continuously and automatically to individual CI users.

Speech understanding in adult cochlear implant users

1994 ◽  
Vol 95 (5) ◽  
pp. 2905-2905
Author(s):  
Richard S. Tyler ◽  
Mary Lowder ◽  
George Woodworth ◽  
Aaron Parkinson
Keyword(s):  
Cochlear Implant ◽  
Speech Understanding

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
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