Experimental Investigation on Acoustic Energy Conversion Using Single and Double PZT Film by Modified Resonator

Abstract

AbstractSound and vibration-based energy harvesting techniques have been drawing the attention of many researchers because of energy scarcity. Low-frequency energy harvesting is a highly complicated process. However, the physical characteristics of piezoelectric materials can be utilized to extract energy from low-frequency acoustic or vibration-based waves. In this study, experiments have been conducted on acoustic energy harvesting from low-frequency sound sources using modified resonators with single and double PZT film configurations. Based on the results obtained from the experiment, it is clear that double film configuration is better for the purpose. Under the condition of 100 Hz constant frequency, the single unit double film configuration showed a significant improvement in voltage over single film units. The overall power output for both single and double film configuration in the noise barrier was recorded. The results show that double film configuration increases the power output. A modified resonator of double film configuration can be used to power up low power-consuming devices and is extensively applicable for noise reduction in big cities and industrial areas.KeywordsSound energy extractionHigh wavelength sound energyResonatorPZT filmSound energy extraction barrier