Cochlear Implants: Electric and Acoustic Stimulation

描述(由申请人提供)：人工耳蜗接受者在噪声存在的情况下，传统上在言语清晰度方面表现不佳。最近，将电刺激和低频声刺激结合在一起的听者在噪声中表现出显著的言语感知改善，超过了声刺激和电刺激的清晰度分数之和。因此，这项研究的主要目的是评估低频声处理，包括频率分辨率、时间分辨率和耳蜗压，是否有助于解释电和声联合刺激的协同效应。此外，这些听者中的一个子集将在植入前和植入后进行检查，以调查部分植入的电极阵列对双频声音处理的影响，包括相对较小的离散频率步长的低频安静阈值、耳蜗压、时间分辨率、频率分辨率以及对安静和噪声中的语音感知的估计。植入前和植入后都需要采取措施，以准确评估手术对耳蜗尖端的影响。

DESCRIPTION (provided by applicant): Cochlear implant recipients have traditionally performed poorly on measures of speech intelligibility in the presence of noise. Recently, listeners incorporating both electric and low-frequency acoustic stimulation of the same cochlea have demonstrated significant improvements in speech perception in noise that exceed the sum of the intelligibility scores of acoustic and electric stimulation, alone. Thus, the main purpose of this study is to assess whether low-frequency acoustic processing, including frequency resolution, temporal resolution, and cochlear compression, can help account for the synergistic effect of combined electric and acoustic stimulation. Additionally, a subset of these listeners will be examined both pre- and post-implant to investigate the effects of the partially implanted electrode array on tow-frequency acoustic processing including low-frequency quiet thresholds in relatively small, discrete frequency steps, cochlear compression, temporal resolution, frequency resolution, and estimates of speech perception both in quiet and in noise. Both pre- and post-implant measures will be required to accurately assess the effects of the surgery on the apical end of the cochlea.