Department of Communication Sciences and Disorders, The University of Iowa, USA.
Ear Hear. 2011 Jul-Aug;32(4):536-40. doi: 10.1097/AUD.0b013e31820c81b0.
Recent studies suggest that pitch perceived through cochlear implants (CIs) changes with experience to minimize spectral mismatches between electric and acoustic hearing. This study aimed to test whether perceived spectral mismatches are similarly minimized between two electric inputs.
Pitch perception was studied in a subject with a 10-mm CI in one ear and a 24-mm CI in the other ear. Both processors were programmed to allocate information from the same frequency range of 188-7938 Hz, despite the large differences in putative insertion depth and stimulated cochlear locations between the CIs.
After 2 and 3 years of experience, pitch-matched electrode pairs between CIs were aligned closer to the processor-provided frequencies than to cochlear position.
Pitch perception may have adapted to reduce perceived spectral discrepancies between bilateral CI inputs, despite 2-3 octave differences in tonotopic mapping.
最近的研究表明,通过人工耳蜗(CI)感知的音高会随着经验的变化而变化,以最小化电和声学听觉之间的频谱不匹配。本研究旨在测试两个电输入之间是否也能类似地最小化感知的频谱不匹配。
在一名受试者中研究了音高感知,该受试者一只耳朵中有一个 10mm 的 CI,另一只耳朵中有一个 24mm 的 CI。尽管两个 CI 的假定插入深度和刺激耳蜗位置存在很大差异,但两个处理器都被编程为分配来自 188-7938Hz 相同频率范围的信息。
在 2 年和 3 年的经验之后,CI 之间的音高匹配电极对与处理器提供的频率更接近,而与耳蜗位置的差异更大。
尽管在音调映射方面存在 2-3 个八度的差异,但音高感知可能已经适应,以减少双侧 CI 输入之间感知的频谱差异。