A psychophysical forward masking comparison of longitudinal spread of neural excitation in the Contour™ and straight Nucleus® electrode arrays
A psychophysical forward masking comparison of longitudinal spread of neural excitation in the Contour™ and straight Nucleus® electrode arrays
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DOI：
10.1080/14992020500258743
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发表时间：
2005-10-01
影响因子：
2.7
通讯作者：
Cowan, RSC
中科院分区：
文献类型：
--
作者：
Cohen, LT;Lenarz, T;Cowan, RSC
这项研究的目的是比较植入Nucleus(R)24 Conour(TM)或直电极阵列的受试者的前向掩蔽轮廓的宽度。等高线阵列通常比直线阵列定位得更靠近三次曲面。受试者为14名严重听力损失的语后听力障碍成年人，其中7人使用轮廓阵列，7人使用直线阵。在沿阵列的三个位置(尖端、中部和底部)使用15%响度水平的掩蔽器测量前掩蔽分布。有人假设，使用低水平掩蔽者，掩蔽轮廓宽度将对距离神经结构的距离的差异更敏感。在掩蔽峰值幅度的50%处计算掩蔽宽度。在等高线和直线阵受试组之间，掩蔽宽度没有显著差异。等高线阵列受试者目前的听力阈值和最舒适的听力水平明显较低。
The objective of the study was to compare the widths of forward masking profiles in subjects implanted with the Nucleus (R) 24 Contour (TM) or straight electrode array. The Contour array is typically positioned closer to the modiolus than the straight array. Subjects were fourteen postlingually hearing-impaired adults with severe-profound hearing loss, seven used the Contour array and seven used the straight array. Forward masking profiles were measured at three positions along the array (apical, mid, and basal) using maskers at the 15% loudness level. It was hypothesized that masking profile widths would be more sensitive to differences in distance from the neural structures using low-level maskers. Masking width was calculated at the 50% point of the masking peak amplitude. There were no significant differences in masking widths between Contour and straight array subject groups. Current levels for hearing thresholds and maximum comfortable listening levels were significantly lower for the Contour array subjects.