Baumann U, Helbig S
Zentrum der HNO-Heilkunde, Abteilung Audiologische Akustik, Klinikum der Goethe-Universität, Frankfurt am Main, Germany.
HNO. 2009 Jun;57(6):542-50. doi: 10.1007/s00106-009-1923-2.
After cochlear implantation, individuals with sufficient residual hearing in the lower frequency region are able to successfully combine acoustic and electrical stimulation patterns to improve speech perception, especially in noise, and to improve music appraisal as well. These improvements occur through enhanced transmission of fine structure information by more accurate mapping of the fundamental frequency contour through acoustic hearing. In current cochlear implant systems, the transfer of frequency and melodic contour is very coarse, and the correct detection of pitch contour requires large frequency differences. It is assumed that the acoustically transferred part of the signal enables the cochlear implant recipient to better segregate between speech signals and interfering sounds. The detection and following of a speech signal emitted by a single talker in a multitalker babble situation is improved when fundamental frequencies as grouping cues are present. The preservation of hearing in the implanted ear must be considered a major surgical challenge. The development of very flexible and soft electrode carriers in combination with surgical approaches that minimally traumatize the inner ear enable hearing preservation in nearly all cases.
人工耳蜗植入后，低频区域有足够残余听力的个体能够成功地结合声学和电刺激模式，以改善言语感知，尤其是在噪声环境中，同时也能改善音乐鉴赏能力。这些改善是通过声学听力更精确地映射基频轮廓来增强精细结构信息的传递而实现的。在当前的人工耳蜗系统中，频率和旋律轮廓的传递非常粗糙，正确检测音高轮廓需要较大的频率差异。据推测，信号的声学传递部分使人工耳蜗植入者能够更好地分离语音信号和干扰声音。当存在基频作为分组线索时，在多说话者嘈杂环境中检测和跟踪单个说话者发出的语音信号的能力会得到改善。在植入耳中保留听力必须被视为一项重大的外科挑战。结合对内耳创伤最小的手术方法开发非常灵活和柔软的电极载体，几乎在所有情况下都能实现听力保留。
