Comparing Fixed and Individualized Channel Interaction Coefficients for Speech Perception With Dynamic Focusing Cochlear Implant Strategies.
Comparing Fixed and Individualized Channel Interaction Coefficients for Speech Perception With Dynamic Focusing Cochlear Implant Strategies.
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DOI：
10.1177/23312165231176157
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发表时间：
2023-01
影响因子：
2.7
通讯作者：
Arenberg, Julie G.
中科院分区：
文献类型：
--
作者：
Caswell-Midwinter, Benjamin;Arenberg, Julie G.
动态聚焦耳蜗植入策略旨在通过改变作为输入电平的函数的电流聚焦程度来模拟正常耳蜗激励模式。这些策略的语音感知效益的结果是喜忧参半。在以前的研究中，渠道互动系数（K），调解当前水平和集中程度之间的关系，固定跨渠道和参与者。固定K而不考虑通道相互作用和准确刺激目标神经元所需的电流可能引起次优的响度增长和言语感知。本研究测试了相对于固定K和单极策略，个性化K是否能改善言语感知。植入的成年人的14只耳朵被编程与脉冲持续时间，脉冲频率，过滤和响度匹配的14通道策略。句子识别和元音识别在60分贝声压级相当于在安静和四说话者牙牙学语。 在组水平上，安静和噪音中的语音识别策略相似。在个人层面上，有参与者受益于噪声中言语感知的动态聚焦策略。受益模式通常不清楚，超出了聚焦阈值，听力损失持续时间和个体K受益之间的关联。参与者对动态聚焦的清晰度和易听性进行了评价。几乎所有的参与者都表示愿意在带回家的试验中使用这些策略。这些结果表明，虽然个性化K并不能使所有人受益，但仍有一些人受益，电极-神经元界面可能对此起作用。未来的研究将使用带回家的试验来评估动态聚焦策略的适应性。
Dynamic focusing cochlear implant strategies aim to emulate normal cochlear excitation patterns by varying the degree of current focusing as a function of input level. Results on the speech perception benefits of these strategies have been mixed. In previous studies, channel interaction coefficients (K), which mediate the relationship between current level and degree of focusing, were fixed across channels and participants. Fixing K without accounting for channel interaction and the current required to accurately stimulate target neurons may elicit suboptimal loudness growth and speech perception. This study tested whether individualizing K improved speech perception relative to fixed-K and monopolar strategies. Fourteen ears of implanted adults were programmed with 14-channel strategies matched on pulse duration, pulse rate, filtering, and loudness. Sentence recognition and vowel identification was measured at 60 dB SPL equivalent in quiet and four-talker babble. On the group level, speech recognition in quiet and noise was similar between strategies. On the individual level, there were participants who benefitted with dynamic focusing strategies for speech perception in noise. Patterns of benefit were generally unclear, beyond associations between focused thresholds, duration of hearing loss, and individual-K benefit. Participants rated dynamic focusing like monopolar in clarity and ease of listening. Almost all participants expressed their willingness to use the strategies in a take-home trial. These results suggest that while individualizing K does not benefit all, there are individuals who benefit, for which the electrode–neuron interface may play a role. Future studies will evaluate acclimatization of dynamic focusing strategies using take-home trials.
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影响因子：
3.7
作者：
Jahn, Kelly N.;Arenberg, Julie G.
通讯作者：
Arenberg, Julie G.
影响因子：
2.7
作者：
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Oxenham, Andrew J.
影响因子：
3.7
作者：
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Frijns, Johan H. M.
影响因子：
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作者：
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通讯作者：
Galvin, John J 3rd
影响因子：
2.4
作者：
Chatterjee, M
通讯作者：
Chatterjee, M