Zaika V. Мethods and tools for designing of piezoceramic transducers for computer acoustic measurement systems

Dissertation is devoted to actual issues of further improvement of piezoceramic transducers designing methods. Studies aimed at improving of piezoceramic transducers that used in computer systems are presented in thesis. Method for electroacoustic transducers characteristics improving with additional elements through the use of quarter-wave and cavity resonators that are used for acoustic power increasing, resonant frequency decreasing and expansion of transducers operating frequency band is refined in this work. Method of additional oscillating circuit by adding of transformer's decoupling to the piezoelectric element electrodes for the purpose of running wave excitation was improved. Method of spatial and angular interaction, which is used in order to maximize flexural vibrations, was improved. New connection diagrams of monomorphic piezoelectric elements that can create flexural vibrations that are 4 times more powerful and increase the sound pressure level by 20-25 dB were developed. Excitation circuits of transducers (radiators) in the form of cylindrical piezoelectric elements, which can increase the level of generated sound pressure by 30 dB, were developed and investigated. Stand, which allows us to investigate the piezoceramic transducers characteristics and to transmit the measurement results to a computer, was developed.