Evaluation of binaural functions in bilateral cochlear implant users
Evaluation of binaural functions in bilateral cochlear implant users
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DOI：
10.1080/14992020802075407
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发表时间：
2008-01-01
影响因子：
2.7
通讯作者：
Soli, Sigfrid D.
中科院分区：
文献类型：
--
作者：
Chan, Jenny C. Y.;Freed, Daniel J.;Soli, Sigfrid D.
在双侧耳蜗植入者的康复过程中，双耳能力很难评估，但理解它很重要。本研究的目的之一是开发一种双耳评估方法，使用直接电输入到人工耳蜗植入体，“直接连接评估”，通过适当的头相关传递函数（HRTF）进行预处理，以模拟双耳提示，用于从掩蔽和声音定位中释放空间。第二个目的是创建和评估新的，修改后的规则，用于自适应测量噪声中的语音接收阈值与听力噪声测试（HINT）用于人工耳蜗植入受试者。第三个目的是开发一种新的声音定位协议，其难度被调整到个人耳蜗植入主体的声音定位能力。这些新的协议与直接连接的方法相结合，并在声学听力受试者和人工耳蜗植入者进行了评估。HINT阈值和声音定位分数测量声场和直接连接的方法没有显着差异，并在两组中高度相关。从掩蔽，头影效应，双耳静噪，双耳总和来自阈值的空间释放的措施也是可比的两种方法。HINT的替代自适应规则被发现可以测量同一性能强度函数上的不同点。这些规则允许对研究中的所有人工耳蜗受试者进行自适应测试，并将其阈值与正常值进行比较。声音定位成功地测量在所有科目的扇区定位协议，其难度是要调整到受试者的定位能力。该协议减少了三分之一到一半的时间来完成本地化能力的评估。
Binaural abilities are difficult to assess, yet important to understand, in the course of rehabilitating bilateral cochlear implantees. One purpose of this research was to develop a binaural assessment methodology using direct electrical input to the cochlear implant, ''direct connect assessment'', pre-processed by appropriate headrelated transfer functions (HRTFs) to simulate the binaural cues for spatial release from masking and sound localization. A second purpose was to create and evaluate new, modified rules for adaptively measuring the speech reception threshold in noise with the Hearing In Noise Test (HINT) for use with cochlear implant subjects. A third purpose was to develop a new sound localization protocol whose difficulty is adjusted to the sound localization ability of the individual cochlear implant subject. These new protocols were combined with the direct connect method and evaluated in acoustic hearing subjects and cochlear implant subjects. HINT thresholds and sound localization scores measured in the sound field and with the direct connect method did not differ significantly and were highly correlated in both groups. Measures of spatial release from masking, head shadow effects, binaural squelch, and binaural summation derived from the thresholds also were comparable for both methods. The alternative adaptive rules for HINT were found to measure different points on the same performance-intensity function. These rules allowed all cochlear implant subjects in the study to be tested adaptively and their thresholds to be compared to norms. Sound localization was measured successfully in all subjects with a sector localization protocol whose difficulty is to be adjusted to the localization ability of the subject. This protocol reduced by one-third to one-half the time required to complete the assessment of the localization ability.