A multiple electrode cochlear implant
A multiple electrode cochlear implant
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多电极人工耳蜗
DOI：
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发表时间：
1977
影响因子：
1.7
通讯作者：
D. Dewhurst
中科院分区：
文献类型：
--
作者：
G. Clark;Y. Tong;R. Black;I. C. Forster;J. Patrick;D. Dewhurst
墨尔本大学耳鼻喉科和电气工程系（UMDOLEE）接收和刺激多电极人工耳蜗助听器的组件产生持续的刺激。它具有刺激脉冲形状，可以最大限度地减少有毒物质的产生和电极金属的损失，这是通过双相矩形波形实现的，其中第一相相对于地为负。每个刺激阶段的持续时间为180毫秒，这个时间足够长，可以允许低水平的电流刺激，也足够短，可以实现1000脉冲/秒的速度。为了与我们目前对音高感知的理解一致，该装置允许多个电极的独立刺激。此外，为了电隔离刺激到小区域，有能力改变电流，并在各个电极独立设置阈值。也可以改变到邻近电极的脉冲的相位和振幅，以帮助定位电流。对单个或电极组的刺激模式也可以改变，以使研究能够进行，以确定在更正常的动态范围内传递频率和强度信息的方法。
The University of Melbourne Departments of Otolaryngology and Electrical Engineering (UMDOLEE) receiving and stimulating component of a multiple-electrode cochlear implant hearing prosthesis produces constant stimulation. It has a stimulating pulse shape that minimizes the production of toxic substances and loss of metal from the electrodes, and this is achieved with a biphasic rectangular waveform where the first phase is negative with respect to ground. The duration of each stimulus phase in 180 msec, which is long enough to allow low levels of current stimulation, and short enough to permit rates of 1000 pulses/second to be achieved. In order to be consistent with our present understanding of the perception of pitch, the device permits the independent stimulation of a number of electrodes. Furthermore, to electrically isolate the stimulus to small areas, there is the capacity to vary the current and set the threshold independently at individual electrodes. The phase and amplitude of the pulses to neighbouring electrodes with also be varied to assist in localizing the current flow. The pattern to stimulation to individual or groups of electrodes can also be altered to enable studies to be carried out to determine ways of conveying frequency and intensity information over a more normal dynamic range.