Simpson Andrea, McDermott Hugh J, Dowell Richard C, Sucher Catherine, Briggs Robert J S
The Cooperative Research Centre for Cochlear Implant and Hearing Aid Innovation, The University of Melbourne, Australia.
Int J Audiol. 2009 Feb;48(2):63-73. doi: 10.1080/14992020802452184.
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.
通过匹配声学和电刺激模式之间的频率和/或感知音高，对人工耳蜗与残余听力辅助的适配情况进行了评估。五名使用Nucleus Freedom电极阵列且有残余声学听力的人工耳蜗使用者参与了研究。采用心理物理学方法绘制了一张图谱，在此图谱中，人工耳蜗被设置为仅在声学听力不再被认为有用的频率以上提供高频信息。将其与提供全频率范围的第二张图谱进行比较。在安静和嘈杂环境中测量言语识别能力之前，受试者佩戴每张图谱数周。术后，所有受试者的平均听力阈值恶化了27分贝。然而，与术前得分相比，人工耳蜗植入提供了更好的言语识别能力，当受试者同时佩戴助听器和人工耳蜗时效果最佳。当受试者同时佩戴人工耳蜗和助听器进行言语测试时，两张图谱之间未发现显著差异。总之，对于本研究的受试者，无论选择何种频率到电极的分配方式，人工耳蜗与助听器的组合在提供言语感知益处方面都是有效的。
