Melodic contour identification by cochlear implant listeners
Melodic contour identification by cochlear implant listeners
复制标题
DOI：
10.1097/01.aud.0000261689.35445.20
复制
发表时间：
2007-06-01
期刊：
影响因子：
3.7
通讯作者：
Nogaki, Geraldine
中科院分区：
文献类型：
--
作者：
Galvin, John J., III;Fu, Qian-Jie;Nogaki, Geraldine
目的：虽然人工耳蜗植入物为许多聋人患者提供了安静的良好言语理解，但人工耳蜗植入物的音乐感知和欣赏仍然是大多数人工耳蜗植入物使用者的主要挑战。本研究调查了封闭式旋律轮廓识别（MCI）任务是否可以用于量化人工耳蜗植入者识别音乐旋律的能力，以及MCI性能是否可以通过适度的听觉训练得到改善。本研究还比较了MCI性能与熟悉的旋律识别（FMI）的性能，有和没有MCI training.Methods：MCI任务，测试刺激旋律轮廓组成的5个音符的持续时间相等，其频率对应的音乐间隔。每个轮廓中的连续音符之间的间隔在1到5个音符之间变化;轮廓的“根音符”也不同（A3，A4和A5）。九个不同的音乐模式产生的每一个间隔和根音符的条件下，在135个音乐轮廓。在11个人工耳蜗植入者中测量这些旋律轮廓的识别。FMI也进行了评估，在相同的主题，识别12个熟悉的旋律进行了测试，并没有节奏线索。MCI也训练了6个科目，使用自定义软件和旋律轮廓呈现在不同的频率范围内，从用于testing.Results：结果表明，MCI识别性能是高度可变的人工耳蜗用户之间，从14%到91%的正确。对于大多数受试者来说，MCI的表现随着连续音符之间的连音数的增加而改善; A3根音符条件下的表现略低。平均FMI性能是58%的正确时，节奏线索被保留和29%的正确时，节奏线索被删除。统计分析显示MCI表现和FMI表现（有或没有节奏线索）之间没有显着的相关性。然而，MCI成绩与元音识别成绩显著相关; FMI成绩与人工耳蜗受试者的音素识别成绩不相关。初步结果还表明，MCI培训提高了所有科目的MCI性能，改善MCI性能也推广到改善FMI performance.Conclusions：初步数据表明，封闭的MCI任务是一个可行的方法，对量化的一个重要组成部分，人工耳蜗植入用户的音乐感知。MCI性能的改善和通过培训推广到FMI性能表明，MCI培训可能有助于改善人工耳蜗植入体用户的音乐感知和欣赏;这种培训对于正确评估患者性能可能是必要的，因为急性措施可能会低估人工耳蜗植入体设备传输和人工耳蜗植入体听众接收的音乐信息量。
Objective: While the cochlear implant provides many deaf patients with good speech understanding in quiet, music perception and appreciation with the cochlear implant remains a major challenge for most cochlear implant users. The present study investigated whether a closed-set melodic contour identification (MCI) task could be used to quantify cochlear implant users' ability to recognize musical melodies and whether MCI performance could be improved with moderate auditory training. The present study also compared MCI performance with familiar melody identification (FMI) performance, with and without MCI training.Methods: For the MCI task, test stimuli were melodic contours composed of 5 notes of equal duration whose frequencies corresponded to musical intervals. The interval between successive notes in each contour was varied between 1 and 5 semitones; the "root note" of the contours was also varied (A3, A4, and A5). Nine distinct musical patterns were generated for each interval and root note condition, resulting in a total of 135 musical contours. The identification of these melodic contours was measured in 11 cochlear implant users. FMI was also evaluated in the same subjects; recognition of 12 familiar melodies was tested with and without rhythm cues. MCI was also trained in 6 subjects, using custom software and melodic contours presented in a different frequency range from that used for testing.Results: Results showed that MCI recognition performance was highly variable among cochlear implant users, ranging from 14% to 91% correct. For most subjects, MCI performance improved as the number of semitones between successive notes was increased; performance was slightly lower for the A3 root note condition. Mean FMI performance was 58% correct when rhythm cues were preserved and 29% correct when rhythm cues were removed. Statistical analyses revealed no significant correlation between MCI performance and FMI performance (with or without rhythmic cues). However, MCI performance was significantly correlated with vowel recognition performance; FMI performance was not correlated with cochlear implant subjects' phoneme recognition performance. Preliminary results also showed that the MCI training improved all subjects' MCI performance; the improved MCI performance also generalized to improved FMI performance.Conclusions: Preliminary data indicate that the closed-set MCI task is a viable approach toward quantifying an important component of cochlear implant users' music perception. The improvement in MCI performance and generalization to FMI performance with training suggests that MCI training may be useful for improving cochlear implant users' music perception and appreciation; such training may be necessary to properly evaluate patient performance, as acute measures may underestimate the amount of musical information transmitted by the cochlear implant device and received by cochlear implant listeners.