Reducing current spread using current focusing in cochlear implant users.
Reducing current spread using current focusing in cochlear implant users.
复制标题
DOI：
10.1016/j.heares.2011.12.009
复制
发表时间：
2012-02
期刊：
影响因子：
2.8
通讯作者：
Srinivasan AG
中科院分区：
文献类型：
--
作者：
Landsberger DM;Padilla M;Srinivasan AG
在困难的听力情况下，耳蜗植入体的性能受到通道相互作用的限制。已知部分三极（PTP）刺激减少兴奋扩散（SOE）。然而，电流聚焦的程度越大，维持固定响度所需的绝对电流就越大。随着电流的增加，国有企业也在增加。在实验1中，通过前向掩蔽程序测量具有不同程度的电流聚焦的同等大声刺激的SOE。结果表明，在一个固定的响度，一些但不是所有的患者有一个减少的SOE与PTP刺激。因此，PTP语音处理策略似乎可以仅改善SOE降低的患者的频谱分辨率。在实验2中，测量区分不同水平的电流聚焦的能力。在实验3中，患者主观缩放的言语描述符的刺激的各种水平的电流聚焦。言语描述符的区分和缩放与SOE减少相关，这表明这两种技术都有可能在临床上用于快速预测哪些患者将从当前的聚焦策略中获益。
Cochlear implant performance in difficult listening situations is limited by channel interactions. It is known that partial tripolar (PTP) stimulation reduces the spread of excitation (SOE). However, the greater the degree of current focusing, the greater the absolute current required to maintain a fixed loudness. As current increases, so does SOE. In experiment 1, the SOE for equally loud stimuli with different degrees of current focusing is measured via a forward-masking procedure. Results suggest that at a fixed loudness, some but not all patients have a reduced SOE with PTP stimulation. Therefore, it seems likely that a PTP speech processing strategy could improve spectral resolution for only those patients with a reduced SOE. In experiment 2, the ability to discriminate different levels of current focusing was measured. In experiment 3, patients subjectively scaled verbal descriptors of stimuli of various levels of current focusing. Both discrimination and scaling of verbal descriptors correlated well with SOE reduction, suggesting that either technique have the potential to be used clinically to quickly predict which patients would receive benefit from a current focusing strategy.
登录
查看更多内容
影响因子：
2.8
作者：
Landsberger, David M.;Srinivasan, Arthi G.
通讯作者：
Srinivasan, Arthi G.
影响因子：
2.8
作者：
Bierer, Julie Arenberg;Bierer, Steven M.;Middlebrooks, John C.
通讯作者：
Middlebrooks, John C.
影响因子：
2.4
作者：
Fu, QJ;Shannon, RV;Wang, XS
通讯作者：
Wang, XS
影响因子：
1.4
作者：
Filipo, R;Mancini, P;D'Elia, C
通讯作者：
D'Elia, C
影响因子：
2.8
作者：
Briaire, JJ;Frijns, JHM
通讯作者：
Frijns, JHM