Clinical evaluation of cochlear implant sound coding taking into account conjectural masking functions, MP3000.
Clinical evaluation of cochlear implant sound coding taking into account conjectural masking functions, MP3000.
复制标题
DOI：
10.1179/1754762811y0000000009
复制
发表时间：
2011-11-01
影响因子：
--
通讯作者：
Smoorenburg, Guido
中科院分区：
文献类型：
--
作者：
Buechner, Andreas;Beynon, Andy;Smoorenburg, Guido
SPEAK和ACE编码策略的有效性与一种新的策略MP3000进行了比较，由37个欧洲种植中心，包括221名受试者。SPEAK和ACE策略基于选择8-10个具有最高水平的光谱分量，而MP3000基于仅选择4-6个分量，其中最高水平相对于掩蔽的扩展的估计。每个组件的脉率是固定的。SPEAK/ACE策略和MP3000策略在言语得分和编码偏好方面无显著差异。 MP3000策略的电池寿命延长了24%。使用MP3000，发现六个组件的选择结果最好。此外，与40/30和20/15 dB/Bark的其他组合相比，低频斜率为50 dB/Bark和高频斜率为37 dB/Bark（50/37）的掩蔽函数的结果最好。最陡峭的斜坡发现的最佳结果似乎不同意目前的估计，在电刺激掩蔽的传播。未来的研究可能会揭示，如果SPEAK/ACE的性能可以通过增加MP3000中的通道数超过4-6来提高，并且它应该更多地揭示MP3000中应用的掩蔽函数的斜率的最佳陡度。
Efficacy of the SPEAK and ACE coding strategies was compared with that of a new strategy, MP3000, by 37 European implant centers including 221 subjects. The SPEAK and ACE strategies are based on selection of 8-10 spectral components with the highest levels, while MP3000 is based on the selection of only 4-6 components, with the highest levels relative to an estimate of the spread of masking. The pulse rate per component was fixed. No significant difference was found for the speech scores and for coding preference between the SPEAK/ACE and MP3000 strategies. Battery life was 24% longer for the MP3000 strategy. With MP3000 the best results were found for a selection of six components. In addition, the best results were found for a masking function with a low-frequency slope of 50 dB/Bark and a high-frequency slope of 37 dB/Bark (50/37) as compared to the other combinations examined of 40/30 and 20/15 dB/Bark. The best results found for the steepest slopes do not seem to agree with current estimates of the spread of masking in electrical stimulation. Future research might reveal if performance with respect to SPEAK/ACE can be enhanced by increasing the number of channels in MP3000 beyond 4-6 and it should shed more light on the optimum steepness of the slopes of the masking functions applied in MP3000.