Fully objective hearing threshold estimation in cochlear implant users using phase-locking value growth functions.
Hear Res
; 377: 24-33, 2019 06.
Article
em En
| MEDLINE
| ID: mdl-30884368
ABSTRACT
Cochlear implant users require fitting of electrical threshold and comfort levels for optimal access to sound. In this study, we used single-channel cortical auditory evoked responses (CAEPs) obtained from 20 participants using a Nucleus device. A fully objective method to estimate threshold levels was developed, using growth function fitting and the peak phase-locking value feature. Results demonstrated that growth function fitting is a viable method for estimating threshold levels in cochlear implant users, with a strong correlation (râ¯=â¯0.979, pâ¯<â¯0.001) with behavioral thresholds. Additionally, we compared the threshold estimates using CAEPs acquired from a standard montage (Cz to mastoid) against using a montage of recording channels near the cochlear implant, simulating recording from the device itself. The correlation between estimated and behavioural thresholds remained strong (râ¯=â¯0.966, pâ¯<â¯0.001), however the recording time needed to be increased to produce a similar estimate accuracy. Finally, a method for estimating comfort levels was investigated, and showed that the comfort level estimates were mildly correlated with behavioral comfort levels (râ¯=â¯0.50, pâ¯=â¯0.024).
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Limiar Auditivo
/
Implantes Cocleares
/
Ajuste de Prótese
/
Pessoas com Deficiência Auditiva
/
Implante Coclear
/
Eletroencefalografia
/
Potenciais Evocados Auditivos
/
Percepção Sonora
Tipo de estudo:
Prognostic_studies
Limite:
Adult
/
Aged
/
Aged80
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Hear Res
Ano de publicação:
2019
Tipo de documento:
Article
País de publicação:
HOLANDA
/
HOLLAND
/
NETHERLANDS
/
NL
/
PAISES BAJOS
/
THE NETHERLANDS