Abstract: The present invention relates to a cochlear implant apparatus, and more particularly, to a cochlear implant apparatus capable of controlling the sensitivity or selectivity of sound through actuators. In accordance with an exemplary embodiment of the present invention, a cochlear implant apparatus for active feedback control which is inserted into the human body and configured to detect a sound in each frequency band includes a sensor unit configured to detect vibration according to a sound and generate an electrical signal corresponding to a magnitude of the vibration and actuators disposed in the sensor unit and each configured to react to the electrical signal and to control sensitivity according to the magnitude of the sound or the selectivity of a sound detected in each frequency band.

Abstract: The present invention relates to a cochlear implant apparatus, and more particularly, to a cochlear implant apparatus capable of controlling the sensitivity or selectivity of sound through actuators. In accordance with an exemplary embodiment of the present invention, a cochlear implant apparatus for active feedback control which is inserted into the human body and configured to detect a sound in each frequency band includes a sensor unit configured to detect vibration according to a sound and generate an electrical signal corresponding to a magnitude of the vibration and actuators disposed in the sensor unit and each configured to react to the electrical signal and to control sensitivity according to the magnitude of the sound or the selectivity of a sound detected in each frequency band.

Abstract: The present invention relates to a chemical sensor for detection of hydrazine. The invention detects hydrazine with a modified electrode using ZnO nanostructures such as nanonails and hexagonal-shaped nanorods by electrochemical analysis. The ZnO nanostructures are grown by simple non-catalytic thermal evaporation process in the presence of oxygen and coated on the surface of electrode. The prepared ZnO nanostructures/electrode is used as electron mediator and enhances the electron transfer between the hydrazine and electrodes and produces a high sensitivity. The most important target of this invention is to present the use of novel, cost effective and easily grown ZnO nanostructures as efficient electron mediators to modify the electrodes and fabricate the chemical sensor for effective detection of hydrazine.