Transducers Science and Technology - Bio-Ears (Ahmad Dagamseh)

These systems will consist of arrays of similar but distinctive sensors, acting in parallel. They will be fabricated using micro-machining technology providing sensor dimensions matching the biological examples by which they are inspired. Understanding the functioning of hair-sensor arrays and fabrication possibilities of high-density hair-sensor arrays is a prerequisite to uncover a broad range of structures and the large potential for spatio-temporal flow pattern measurements. However, such measurements can only be realized when each array element is interrogated individually. Wafer-scale hair-sensor arrays with separate electrodes give the possibility to measure signals from different hairs individually and simultaneously. Reducing the complexity of interfacing hair-sensor arrays by minimizing the number of interconnects while maintaining real-time signals and large signal-to-noise ratio (SNR) is our target. Frequency division Multiplexing (FDM) technique can be used as array-addressing scheme to simultaneously retrieve signals from multiple hair-sensors without deterioration of the performance of individual hair-sensors. The virtue of the FDM scheme is especially realized with large numbers of array elements.