1.Partial Implantable Hearing Device
	SOUNDTEC Direct System is a middle ear partially implantable electromagnetic device invented in Oklahoma. FDA approved this device on Sept 2001. Dr. Rong Gan was the leading researcher to accomplish the design and in vitro testing of the device.
2.Total Implantable Hearing Device (Next Generation Device)
This project on middle ear totally implantable hearing system (TIHS) was initiated by Dr. Rong Z. Gan after her joining OU faculty in 1999. With funding from OCAST, the "Proof of Concept" and "Phase I" studies are successfully completed (US and PTC patent pending). The TIHS consists of an implant, an implantable electromagnetic coil, an assembly of implantable microphone, sound processor (sound amplifier) and rechargeable battery, and a remote control unit. The components of TIHS such as the implantable coil and implant magnet are designed using our 3-D FE computer model of human ear and tested in human cadaver ears. Schematic of totally implantable hearing system (TIHS). Implantable hearing devices - Bench Test Implantable hearing devices -Test in cadaver ear
3. Electromagnetic Analysis
An implantable hearing device comprises of an implant magnet and a solenoid. The electromagnetic field generated by the device is modeled using the ANSYS software. 2D and 3D models are created for the study. Further work will be in combining the electromagnetic analysis and the middle ear structural modeling to predict the functions of implantable devices for sound amplification. Magnetic flux line plotted for coil model#2.