Yoon Yang-Soo, Shin You-Ree, Gho Jae-Sook, Fu Qian-Jie
Cochlear Implants Int. 2015 May;16(3):159-67. doi: 10.1179/1754762814Y.0000000101. Epub 2014 Oct 20.
Objectives The present study characterizes the relationship between bimodal benefit and hearing aid (HA) performance, cochlear implant (CI) performance, and the difference in the performances of the two devices. Methods Fourteen adult bimodal listeners participated in the study. Consonant, vowel, and sentence recognition were measured in quiet and noise (at a +5 and +10 dB signal-to-noise ratio (SNR)) with an HA alone, a CI alone, and with the combined use of an HA and CI in each listener. Speech and noise were presented directly in front of the listener. Results The correlation analyses showed that bimodal benefit was significantly associated with the difference in performances of a CI and an HA in all testing materials, with HA-alone performance in vowel recognition, and with CI-alone performance in sentence recognition. However, regression analyses showed that the independent contribution of the difference in performance across ears to bimodal benefit was significant, irrespective of the testing material or the SNR: the smaller the difference, the greater the benefit. Further, the independent contributions of HA-only performance and CI-alone performance were not significant factors in predicting the existence of bimodal benefit across testing materials and SNRs when the effect of the difference between CI and HA performance was removed from the model. Conclusion The results suggest that bimodal benefit is limited by how effectively the modalities integrate, rather than HA-only or CI-alone performance, and that this integration is facilitated when the performances of the modalities are similar.
目的 本研究旨在描述双模式助听效益与助听器（HA）性能、人工耳蜗（CI）性能以及这两种设备性能差异之间的关系。方法 14名成年双模式听力使用者参与了本研究。分别测量了每位受试者在安静环境以及噪声环境（信噪比为+5 dB和+10 dB）下单独使用HA、单独使用CI以及同时使用HA和CI时的辅音、元音和句子识别能力。语音和噪声直接呈现在受试者前方。结果 相关性分析表明，在所有测试材料中，双模式助听效益与CI和HA的性能差异、单独使用HA时的元音识别性能以及单独使用CI时的句子识别性能均显著相关。然而，回归分析表明，无论测试材料或信噪比如何，双耳性能差异对双模式助听效益的独立贡献均显著：差异越小，效益越大。此外，当从模型中去除CI和HA性能差异的影响时，单独使用HA的性能和单独使用CI的性能的独立贡献并非预测跨测试材料和信噪比存在双模式助听效益的显著因素。结论 结果表明，双模式助听效益受模式整合有效性的限制，而非单独使用HA或CI的性能，并且当模式性能相似时，这种整合会更容易实现。
