Generation of Electrical Energy from Sound Energy using Piezoelectric Sensor

Abstract

INTRODUCTION

The demand for electrical energy increases with the rapid increase in the production of technological devices that goes with the rise of the digital age. However, traditional non-renewable energy resources are depleting, hence, paving the way for the high clamor for renewable energy. One of the least tapped energy resources is sound. For this reason, the researchers venture to work on a device that converts sound energy to electrical energy by using the intensity of sound as source and converting this using piezoelectric sensors.

METHODS

The device was constructed following an approved design with features specifically the use of piezoelectric sensors enabling the conversion of sound energy to electrical energy. It was tested for the amount of electricity produced as a function of the preset intensity of sound (60 dB, 70dB, and 80dB). Also, the time it takes to fully charge a power bank was also taken and recorded. Data was collected, analyzed, and interpreted.

RESULTS

Results reveal that for 60 decibels of sound, the amount of voltage produced averages an amount of 12V. For 70 decibels of sound, the amount of voltage produced averages an amount of 22V. For 80 dB of sound, the amount of voltage produced averages an amount of 33V. On the other hand, results show that for 60dB of sound, it took 150 minutes for the power bank to be fully charged. For 70dB and 80 dB sound intensity, it took 180 minutes and 300 minutes to fully charge the same model of power bank.

DISCUSSIONS

Results show that the intensity of sound is directly proportional to the amount of electrical energy produced. This means that as the sound increases in decibels, more voltage is produced. Also, higher intensity of sound means faster charging time for power banks.