Chen Fangyi, Cohen Howard I, Bifano Thomas G, Castle Jason, Fortin Jeffrey, Kapusta Christopher, Mountain David C, Zosuls Aleks, Hubbard Allyn E
Department of Electrical and Computer Engineering, Hearing Research Center Boston University, Boston, Massachusetts 02215, USA.
J Acoust Soc Am. 2006 Jan;119(1):394-405. doi: 10.1121/1.2141296.
The construction, measurement, and modeling of an artificial cochlea (ACochlea) are presented in this paper. An artificial basilar membrane (ABM) was made by depositing discrete Cu beams on a piezomembrane substrate. Rather than two fluid channels, as in the mammalian cochlea, a single fluid channel was implemented on one side of the ABM, facilitating the use of a laser to detect the ABM vibration on the other side. Measurements were performed on both the ABM and the ACochlea. The measurement results on the ABM show that the longitudinal coupling on the ABM is very strong. Reduced longitudinal coupling was achieved by cutting the membrane between adjacent beams using a laser. The measured results from the ACochlea with a laser-cut ABM demonstrate cochlear-like features, including traveling waves, sharp high-frequency rolloffs, and place-specific frequency selectivity. Companion computational models of the mechanical devices were formulated and implemented using a circuit simulator. Experimental data were compared with simulation results. The simulation results from the computational models of the ABM and the ACochlea are similar to their experimental counterparts.
本文介绍了人工耳蜗（ACochlea）的构建、测量和建模。通过在压电膜基板上沉积离散的铜梁制成人工基底膜（ABM）。与哺乳动物耳蜗中的两个流体通道不同，在ABM的一侧设置了单个流体通道，便于使用激光检测ABM另一侧的振动。对ABM和ACochlea都进行了测量。ABM的测量结果表明，ABM上的纵向耦合非常强。通过使用激光切割相邻梁之间的膜，实现了纵向耦合的降低。带有激光切割ABM的ACochlea的测量结果显示出类似耳蜗的特征，包括行波、急剧的高频滚降和特定位置的频率选择性。使用电路模拟器制定并实现了机械设备的配套计算模型。将实验数据与模拟结果进行了比较。ABM和ACochlea计算模型的模拟结果与其实验对应结果相似。
