人工耳蜗使用者的双耳音高融合在相干和非相干包络调制下分别变宽和变窄

文献信息

中文摘要

本研究探讨了耳间振幅调制（AM）相干性是否影响人工耳蜗（CI）使用者的双耳音高融合。十四名成人，包括七名双模式CI使用者和七名双侧CI使用者，在无调制、相干AM以及两种涉及耳间AM相位和AM速率失配的非相干AM条件下，使用双耳分听刺激完成了融合范围测量。相干AM一致地拓宽了融合范围，通常使无调制条件下的融合范围加倍，即使在浅调制深度下也是如此。相反，非相干AM，包括耳间相位或速率失配，则使融合变窄。这些发现表明，时间包络相干性促进了CI使用者的双耳整合，强调了其对听觉处理和CI声音处理设计的重要性。

英文摘要

This study examined whether interaural amplitude modulation (AM) coherence influences binaural pitch fusion in cochlear implant (CI) users. Fourteen adults, including seven bimodal and seven bilateral CI users, completed fusion-range measurements using dichotic stimuli under unmodulated, coherent AM and two incoherent AM conditions involving interaural AM-phase and AM-rate mismatches. Coherent AM consistently broadened fusion ranges, often doubling those in the unmodulated condition, even with shallow modulation depth. In contrast, incoherent AM, including interaural phase or rate mismatches, narrowed fusion. These findings indicate that temporal-envelope coherence facilitates binaural integration in CI users, emphasizing its importance for auditory processing and CI sound-processing design.