Hambrecht F T
Ann Otol Rhinol Laryngol. 1979 Sep-Oct;88(5 Pt 1):729-33. doi: 10.1177/000348947908800522.
Multichannel cochlear prostheses are being developed and evaluated with emphasis on providing sensory deaf individuals enough information about their acoustic environment to permit communication by ordinary speech. Studies of the safety of the electrode arrays and stimulus values indicate that the remaining nerve fibers will not be damaged at the levels that will be typically used in human prostheses, but that a narrow safety range exists for suprathreshold stimuli. Early multichannel human implants have demonstrated that place pitch can be utilized with scali tympani implants, but this has not been demonstrated with modiolar electrode arrays. With both approaches, information about pitch can be conveyed by the frequency of stimulation. Research questions remain on the long-term viability of the eighth nerve with stimulated implants, on the interactions of closely spaced electrodes, on optimal methods of encoding the acoustic signal for multichannel nerve stimulation and on the ability of deaf individuals to utilize this information.
多通道人工耳蜗正在研发和评估中，重点是为感音神经性聋患者提供足够的关于其声学环境的信息，以使其能够通过普通语音进行交流。对电极阵列和刺激值安全性的研究表明，在通常用于人体假体的水平下，剩余的神经纤维不会受到损伤，但超阈值刺激存在一个狭窄的安全范围。早期的多通道人体植入物已经证明，鼓阶植入物可以利用部位音调，但蜗轴电极阵列尚未证明这一点。两种方法都可以通过刺激频率来传达音高信息。关于受刺激植入物的第八神经的长期生存能力、紧密间隔电极的相互作用、多通道神经刺激的声学信号编码的最佳方法以及聋人利用这些信息的能力等研究问题仍然存在。
