Cochlear Implants: Electric and Acoustic Stimulation

描述（由申请人提供）：传统上，人工耳蜗受者在噪声存在下的语音清晰度测量中表现不佳。最近，对同一耳蜗同时进行电刺激和低频声刺激的听者在噪音中语音感知的显著改善，超过了单独进行声刺激和电刺激的可理解性分数的总和。因此，本研究的主要目的是评估低频声学处理（包括频率分辨率、时间分辨率和耳蜗压缩）是否有助于解释电声联合刺激的协同效应。此外，这些听者的一个子集将在植入前和植入后进行检查，以研究部分植入电极阵列对低频声学处理的影响，包括相对较小的低频安静阈值，离散频率步长，耳蜗压缩，时间分辨率，频率分辨率以及在安静和噪音下的语音感知估计。为了准确地评估手术对耳蜗顶端的影响，需要在植入前和植入后进行测量。

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.