An active actuator of a middle-ear implant coupled to the round window membrane (RWM), which transmits vibration to the cochlea, has been used to compensate for hearing loss in patients. However, various factors affect the coupling condition between the actuator and the RWM, resulting in coupling leakage. In this study, a coupling impedance model of the human ear and the actuator was used to investigate the effect of inefficient coupling during reverse stimulation. First, the three-port circuit network model of the actuator was coupled with the acoustic impedance model of human ear reverse sound transmission. Meanwhile, the inefficient coupling impedance was estimated. Then, the effect of the actuator’s coupling on reverse stimulation was studied by comparing the reverse pressure transfer function. Furthermore, the inefficient coupling’s influence in the ear with middle-ear disorder was also investigated by simulating two typical forms of middle-ear disorder: otosclerosis and ossicular chain disarticulation. The results show that the change of the inefficient coupling impedance plays a significant role during reverse stimulation. Inefficient coupling of the actuator and the RWM deteriorates the cochlear response of reverse stimulation over the entire frequency range. Additionally, the coupling effect of the actuator does not change the influence tendency of middle-ear disorder on reverse stimulation’s performance, but changes the response amplitude of the reverse stimulation.

与圆窗膜 (RWM) 耦合的中耳植入物的主动致动器将振动传递到耳蜗，已被用于补偿患者的听力损失。但是，执行器和RWM之间的耦合条件受到各种因素的影响，导致耦合泄漏。在这项研究中，人耳和执行器的耦合阻抗模型用于研究反向刺激期间低效耦合的影响。首先，将执行器的三端口电路网络模型与人耳反向传声的声阻抗模型进行耦合。同时，估计低效耦合阻抗。然后，通过比较反向压力传递函数，研究了执行器耦合对反向刺激的影响。此外，还通过模拟两种典型的中耳疾病形式：耳硬化症和听骨链脱节，研究了低效耦合对中耳疾病耳朵的影响。结果表明，低效耦合阻抗的变化在反向刺激过程中起着重要作用。致动器和 RWM 的低效耦合会在整个频率范围内恶化反向刺激的耳蜗响应。此外，致动器的耦合效应并没有改变中耳障碍对反向刺激性能的影响趋势，而是改变了反向刺激的响应幅度。结果表明，低效耦合阻抗的变化在反向刺激过程中起着重要作用。致动器和 RWM 的低效耦合会在整个频率范围内恶化反向刺激的耳蜗响应。此外，致动器的耦合效应并没有改变中耳障碍对反向刺激性能的影响趋势，而是改变了反向刺激的响应幅度。结果表明，低效耦合阻抗的变化在反向刺激过程中起着重要作用。致动器和 RWM 的低效耦合会在整个频率范围内恶化反向刺激的耳蜗响应。此外，致动器的耦合效应并没有改变中耳障碍对反向刺激性能的影响趋势，而是改变了反向刺激的响应幅度。