Clark G M, Tong Y C, Black R, Forster I C, Patrick J F, Dewhurst D J
J Laryngol Otol. 1977 Nov;91(11):935-45. doi: 10.1017/s0022215100084607.
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.
墨尔本大学耳鼻喉科与电气工程系（UMDOLEE）的多电极人工耳蜗听力假体的接收和刺激组件可产生持续刺激。其刺激脉冲形状能将电极上有毒物质的产生和金属损耗降至最低，这通过双相矩形波形实现，其中第一相对于地为负。每个刺激阶段的持续时间为180毫秒，该时长足以进行低水平电流刺激，同时又短到足以实现每秒1000次脉冲的速率。为与我们目前对音高感知的理解保持一致，该设备允许对多个电极进行独立刺激。此外，为将刺激电隔离到小区域，有能力在各个电极上独立改变电流并设置阈值。相邻电极的脉冲相位和幅度也会改变，以帮助确定电流方向。对单个或成组电极的刺激模式也可改变，以便开展研究，确定在更正常的动态范围内传递频率和强度信息的方法。
