Faculty Opinions recommendation of The representation of voice onset time in the cortical auditory evoked potentials of young children.

2008 ◽  
Author(s):  
Jean-Francois Demonet
Keyword(s):  
Young Children ◽  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Voice Onset Time ◽  
Onset Time ◽  
Cortical Auditory Evoked Potentials

scholarly journals The representation of voice onset time in the cortical auditory evoked potentials of young children

2008 ◽  
Vol 119 (12) ◽  
pp. 2855-2861 ◽  
Author(s):  
Katrina Agung King ◽  
Julia Campbell ◽  
Anu Sharma ◽  
Kathryn Martin ◽  
Michael Dorman ◽  
...  
Keyword(s):  
Young Children ◽  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Voice Onset Time ◽  
Onset Time ◽  
Cortical Auditory Evoked Potentials

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.

New possibility for measuring the cortical auditory evoked potentials: the HEARLab

2014 ◽  
Vol 155 (38) ◽  
pp. 1524-1529
Author(s):  
Ádám Bach ◽  
Ferenc Tóth ◽  
Vera Matievics ◽  
József Géza Kiss ◽  
József Jóri ◽  
...  
Keyword(s):  
Clinical Practice ◽  
Evoked Potentials ◽  
Auditory System ◽  
Hearing Aids ◽  
Pure Tone ◽  
Auditory Evoked Potentials ◽  
Normal Hearing ◽  
Speech Stimuli ◽  
Novel Method ◽  
Cortical Auditory Evoked Potentials

Introduction: Cortical auditory evoked potentials can provide objective information about the highest level of the auditory system. Aim: The purpose of the authors was to introduce a new tool, the “HEARLab” which can be routinely used in clinical practice for the measurement of the cortical auditory evoked potentials. In addition, they wanted to establish standards of the analyzed parameters in subjects with normal hearing. Method: 25 adults with normal hearing were tested with speech stimuli, and frequency specific examinations were performed utilizing pure tone stimuli. Results: The findings regarding the latency and amplitude analyses of the evoked potentials confirm previously published results of this novel method. Conclusions: The HEARLAb can be a great help when performance of the conventional audiological examinations is complicated. The examination can be performed in uncooperative subjects even in the presence of hearing aids. The test is frequency specific and does not require anesthesia. Orv. Hetil., 2014, 155(38), 1524–1529.

Phonetic Imitation by Young Children and Its Developmental Changes

2014 ◽  
Vol 57 (6) ◽  
pp. 2065-2075 ◽  
Author(s):  
Kuniko Nielsen
Keyword(s):  
Young Children ◽  
Picture Naming ◽  
Voice Onset Time ◽  
Onset Time ◽  
Naming Task ◽  
Age Effect ◽  
Third Graders ◽  
Developmental Changes ◽  
Phonological Development ◽  
Before And After

Purpose In the current study, the author investigated the developmental course of phonetic imitation in childhood, and further evaluated existing accounts of phonetic imitation. Method Sixteen preschoolers, 15 third graders, and 18 college students participated in the current study. An experiment with a modified imitation paradigm with a picture-naming task was conducted, in which participants' voice-onset time (VOT) was compared before and after they were exposed to target speech with artificially increased VOT. Results Extended VOT in the target speech was imitated by preschoolers and 3rd graders as well as adults, confirming previous findings in phonetic imitation. Furthermore, an age effect of phonetic imitation was observed; namely, children showed greater imitation than adults, whereas the degree of imitation was comparable between preschoolers and 3rd graders. No significant effect of gender or word specificity was observed. Conclusions Young children imitated fine phonetic details of the target speech, and greater degree of phonetic imitation was observed in children compared to adults. These findings suggest that the degree of phonetic imitation negatively correlates with phonological development.

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