噪声环境下人工耳蜗植入使用者与未保留残余听力者言语神经编码差异。
Differences in neural encoding of speech in noise between cochlear implant users with and without preserved acoustic hearing.
机构信息
Dept. Electrical and Computer Engineering Technology, Rochester Institute of Technology, Rochester, NY 14623, United States.
Dept. Communication Sciences and Disorders, Montclair State University, Montclair, NJ 07043, United States.
出版信息
Hear Res. 2023 Jan;427:108649. doi: 10.1016/j.heares.2022.108649. Epub 2022 Nov 13.
Cochlear implants (CIs) have evolved to combine residual acoustic hearing with electric hearing. It has been expected that CI users with residual acoustic hearing experience better speech-in-noise perception than CI-only listeners because preserved acoustic cues aid unmasking speech from background noise. This study sought neural substrate of better speech unmasking in CI users with preserved acoustic hearing compared to those with lower degree of acoustic hearing. Cortical evoked responses to speech in multi-talker babble noise were compared between 29 Hybrid (i.e., electric acoustic stimulation or EAS) and 29 electric-only CI users. The amplitude ratio of evoked responses to speech and noise, or internal SNR, was significantly larger in the CI users with EAS. This result indicates that CI users with better residual acoustic hearing exhibit enhanced unmasking of speech from background noise.
人工耳蜗（CIs）已经发展到将残余的声音与电刺激相结合。人们一直期望具有残余听力的人工耳蜗使用者比仅使用人工耳蜗的使用者具有更好的噪声下言语感知能力，因为保留的声学线索有助于从背景噪声中掩蔽言语。本研究旨在探索具有残余听力的人工耳蜗使用者与听力较低的人工耳蜗使用者相比，在更好的言语掩蔽方面的神经基础。在多说话者背景噪声中，对 29 名混合（即电声刺激或 EAS）和 29 名纯电人工耳蜗使用者的言语皮质诱发电位进行了比较。EAS 组人工耳蜗使用者对言语和噪声的诱发电位幅度比（即内部信噪比）显著增大。这一结果表明，具有较好残余听力的人工耳蜗使用者在从背景噪声中掩蔽言语方面表现出更强的能力。
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