Acoustic Change Complex Recorded in Hybrid Cochlear Implant Users.
Audiol Neurootol
; 28(3): 151-157, 2023.
Article
em En
| MEDLINE
| ID: mdl-36450234
ABSTRACT
INTRODUCTION:
Expanding cochlear implant (CI) candidacy criteria and advances in electrode arrays and soft surgical techniques have increased the number of CI recipients who have residual low-frequency hearing. Objective measures such as obligatory cortical auditory-evoked potentials (CAEPs) may help clinicians make more tailored recommendations to recipients regarding optimal listening mode. As a step toward this goal, this study investigated how CAEPs measured from hybrid CI users differ in two listening modes acoustic alone (A-alone) versus acoustic plus electric (A + E).METHODS:
Eight successful hybrid CI users participated in this study. Two CAEPs, the P1-N1-P2 and the acoustic change complex (ACC), were measured simultaneously in response to the onset and change of a series of different and spectrally complex acoustic signals, in each of the two listening modes (A-alone and A + E). We examined the effects of listening mode and stimulus type on the onset and ACC N1-P2 amplitudes and peak latencies.RESULTS:
ACC amplitudes in hybrid CI users significantly differed as a function of listening mode and stimulus type. ACC responses in A + E were larger than those in the A-alone mode. This was most evident for stimuli involving a change from low to high frequency.CONCLUSIONS:
Results of this study showed that the ACC varies as a function of listening mode and stimulus type. This finding suggests that the ACC can be used as a physiologic, objective measure of the benefit of hybrid CIs, potentially supporting clinicians in making clinical recommendations on individualized listening mode, or to document subjective preference for a given listening mode. Further research into this potential clinical application in a range of hybrid recipients and/or long electrode users who have residual low-frequency hearing is warranted.Palavras-chave
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Base de dados:
MEDLINE
Assunto principal:
Percepção da Fala
/
Implantes Cocleares
/
Implante Coclear
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article