Kiefer J, Müller J, Pfennigdorff T, Schön F, Helms J, von Ilberg C, Baumgartner W, Gstöttner W, Ehrenberger K, Arnold W, Stephan K, Thumfart W, Baur S
HNO-Kliniken der Johann-Wolfgang-Goethe-Universität Frankfurt, Deutschland.
ORL J Otorhinolaryngol Relat Spec. 1996 May-Jun;58(3):127-35. doi: 10.1159/000276812.
This study compares sentence understanding in quiet and in noise with 3 different speech coding strategies for cochlear implants. The results show that the spectral-peak (SPEAK) and continuous-interleaved-sampling (CIS) coding strategies, based on spectral signal analysis, allow for better speech understanding in quiet as well as in noise, than the multipeak (MPEAK) coding strategy, which relys on speech feature extraction. In the intrasubject comparison of the MPEAK and SPEAK strategies, the SPEAK coding strategy provided a considerable improvement in quiet and in noise for the majority of patients using the Nucleus 22 Mini-implant. In the intersubject comparisons, the mean results in noise with the CIS strategy were superior to both the MPEAK and the SPEAK strategies. The difference was greatest for the most difficult tests in noise. Understanding in noise was least reduced for the CIS strategy. Understanding in quiet was not significantly different between the CIS and the SPEAK strategies; both strategies were significantly better than the MPEAK strategy in quiet. These results are still preliminary, due to the relatively small number of patients and the great inherent intersubject variability of results.
本研究比较了人工耳蜗的三种不同语音编码策略在安静环境和噪声环境下的句子理解情况。结果表明，基于频谱信号分析的谱峰（SPEAK）和连续交错采样（CIS）编码策略，与依赖语音特征提取的多峰（MPEAK）编码策略相比，在安静环境和噪声环境下都能实现更好的语音理解。在MPEAK和SPEAK策略的受试者内比较中，对于大多数使用Nucleus 22微型植入体的患者，SPEAK编码策略在安静环境和噪声环境下都有显著改善。在受试者间比较中，CIS策略在噪声环境下的平均结果优于MPEAK和SPEAK策略。在最难的噪声测试中，差异最大。CIS策略在噪声环境下的理解能力下降最少。CIS和SPEAK策略在安静环境下的理解能力没有显著差异；在安静环境下，这两种策略都明显优于MPEAK策略。由于患者数量相对较少且结果存在较大的个体间固有变异性，这些结果仍属初步。
