A KAIST analysis staff led by Professor Keon Jae Lee from the Division of Supplies Science and Engineering has developed a bioinspired versatile piezoelectric acoustic sensor with multi-resonant ultrathin piezoelectric membrane mimicking the basilar membrane of the human cochlea. The versatile acoustic sensor has been miniaturized for embedding into smartphones and the primary industrial prototype is prepared for correct and far-distant voice detection.
In 2018,Professor Lee introduced the primary idea of a versatile piezoelectric acoustic sensor,impressed by the truth that people can precisely detect far-distant voices utilizing a multi-resonant trapezoidal membrane with 20,000 hair cells. Nevertheless, earlier acoustic sensors couldn’t be built-in into industrial merchandise like smartphones and AI audio system because of their massive machine dimension.
On this work, the analysis staff fabricated a mobile-sized acoustic sensor by adopting ultrathin piezoelectric membranes with excessive sensitivity. Simulation research proved that the ultrathin polymer beneath inorganic piezoelectric skinny movie can broaden the resonant bandwidth to cowl