In this study, acoustic energy was harvested to produce electrical energy using a series of piezoelectric generators connected and placed inside a quarter-wave resonator made of various materials. The different resonator materials used in this work included acrylic, glass, and wood to determine the optimal material for harvesting energy from the quarter-wave resonator. These materials were not used in the design of the quarter-wave resonator tube. Ten piezoelectric generators were connected in parallel to maximize the harvested energy. The piezoelectric generators were placed inside the quarter-wave resonator at a frequency of 146 Hz and 100 dB. The harvested voltage and current were measured at different load resistances ranging from 100 ohms to 1000 ohms for each of the three tubes. The results demonstrated that the resonator achieved optimal performance using the acrylic resonator. Furthermore, the maximum power output from the acrylic tubes was 0.17766 mW at a load of 100 ohms.
abdelhamid mohamed abdelhamid havez (Fri,) studied this question.