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Abstract
The fitting of a cochlear implant together with aided residual hearing was evaluated by means of matching frequency and/or perceived pitch between acoustic and electric modalities. Five cochlear implant users with the Nucleus® Freedom™ electrode array with residual acoustic hearing participated. Psychophysical procedures were used to create a map in which the implant was programmed to provide the listener with high-frequency information only above the frequency at which acoustic hearing was no longer considered useful. This was compared to a second map which provided the full frequency range. Listeners wore each map for a number of weeks before speech recognition was measured in quiet and noise. Post-operatively across subjects, average hearing thresholds worsened by 27 dB. However, cochlear implantation provided superior recognition of speech compared to pre-operative scores, with the best results found when subjects were wearing their hearing aids together with the implant. No significant differences were found between the two maps on speech tests when subjects were wearing their implant together with hearing aid/s. In conclusion, the combination of a cochlear implant together with hearing aid/s was effective at providing speech perception benefits for the listeners of the current study, regardless of the frequency-to-electrode allocation selected.
| Abbreviations | ||
| C | = | Comfort |
| CD | = | Compact disc |
| CI | = | Cochlear implant |
| CIHA | = | Cochlear implant worn together with hearing aid |
| CIHAc | = | Cochlear implant worn together with contralateral hearing aid |
| CIHAi | = | Cochlear implant worn together with ipsilateral hearing aid |
| CNC | = | Consonant – vowel nucleus – consonant |
| CUNY | = | City University of New York |
| dBA | = | Decibel A-weighted |
| HA | = | Hearing aid/s |
| Hz | = | Hertz |
| ICRA | = | International Collegium of Rehabilitative Audiology |
| ITE | = | In-the-ear |
| L | = | Left |
| MP | = | Monopolar |
| MPO | = | Maximum power output |
| NAL-NL | = | National Acoustic Laboratories non-linear |
| R | = | Right |
| SNR | = | Signal-to-noise ratio |
| T | = | Threshold |
| Abbreviations | ||
| C | = | Comfort |
| CD | = | Compact disc |
| CI | = | Cochlear implant |
| CIHA | = | Cochlear implant worn together with hearing aid |
| CIHAc | = | Cochlear implant worn together with contralateral hearing aid |
| CIHAi | = | Cochlear implant worn together with ipsilateral hearing aid |
| CNC | = | Consonant – vowel nucleus – consonant |
| CUNY | = | City University of New York |
| dBA | = | Decibel A-weighted |
| HA | = | Hearing aid/s |
| Hz | = | Hertz |
| ICRA | = | International Collegium of Rehabilitative Audiology |
| ITE | = | In-the-ear |
| L | = | Left |
| MP | = | Monopolar |
| MPO | = | Maximum power output |
| NAL-NL | = | National Acoustic Laboratories non-linear |
| R | = | Right |
| SNR | = | Signal-to-noise ratio |
| T | = | Threshold |
Sumario
Se evaluó la adaptación de un implante coclear junto (con la amplificación de la audición residual) por medio de el pareamiento de la frecuencia y/o el tono percibido entre la modalidad acústica y la eléctrica. Participaron cinco usuarios de implante coclear Nucleus con electrodos Freedom TM, con audición residual. Se utilizaron procedimientos psicofísicos para crear un mapa en el que el implante se programó para proporcionar al usuario información de frecuencia aguda justo por encima de lo que se consideraba útil para la capacidad de la audición residual acústica. Esto se comparó con un segundo mapa que contenía todo el rango frecuencial. Los usuarios utilizaron cada uno de los mapas durante un número de semanas antes de que les midiera el reconocimiento del lenguaje en silencio y en ruido. El promedio de los umbrales auditivos empeoró en 27 dB postoperatoriamente entre sujetos. Sin embargo, el implante coclear proporcionó mejores calificaciones de reconocimiento del lenguaje al compararlos con los resultados preoperatorios, siendo los mejores resultados los obtenidos cuando los sujetos utilizaron su auxiliar auditivo junto con el implante. No hubo diferencias significativas entre ambos mapas en las pruebas con lenguaje cuando los sujetos utilizaban el implante junto con el auxiliar auditivo. En conclusión, la combinación de implante coclear junto con auxiliar auditivo fue efectiva en proporcionar beneficios en la percepción del lenguaje en los sujetos de este estudio, sin importar la asignación de electrodos seleccionada.