Ali Hussnain, Ahmad Talha J, Ajaz Asim, Khan Shoab A
Center for Advanced Research in Engineering, Islamabad, Pakistan.
Annu Int Conf IEEE Eng Med Biol Soc. 2009;2009:803-6. doi: 10.1109/IEMBS.2009.5333707.
This paper presents design overview of a low cost prototype of Cochlear Implant developed from commercial off-the-shelf components. Design scope includes speech processing module implemented on a commercial digital signal processor, transcutaneous data and power transceiver developed from a single pair of inductive coils and finally a stimulator circuitry for cochlear stimulation. Different speech processing strategies such as CIS, SMSP and F0/F1 have been implemented and tested using a novel, indigenously developed speech processing research module which evaluates the performance of speech processing strategies in software, hardware and practical scenarios. Design overview, simulations and practical results of an optimized inductive link using Class E Power Amplifier are presented. Link was designed at a carrier frequency of 2.5MHz for 100mW output power. Receiver logic design and stimulator circuitry was implemented using a PIC microcontroller and off-the-shelf electronic components. Results indicate 40% link efficiency with 128kbps data transfer rate. This low cost prototype can be used for undertaking cochlear implant research in laboratories.
本文介绍了一种采用商用现货组件开发的低成本人工耳蜗原型的设计概述。设计范围包括在商用数字信号处理器上实现的语音处理模块、由一对感应线圈开发的经皮数据和功率收发器，以及用于耳蜗刺激的刺激器电路。已使用一种新颖的、自主开发的语音处理研究模块实施并测试了不同的语音处理策略，如连续交错取样（CIS）、多通道语音处理（SMSP）和基频/第一谐波频率（F0/F1），该模块在软件、硬件和实际场景中评估语音处理策略的性能。文中给出了使用E类功率放大器的优化感应链路的设计概述、仿真和实际结果。该链路设计的载波频率为2.5MHz，输出功率为100mW。接收器逻辑设计和刺激器电路使用PIC微控制器和商用现货电子元件实现。结果表明，数据传输速率为128kbps时，链路效率为40%。这种低成本原型可用于实验室的人工耳蜗研究。
