Abstract

This study explores the conversion of ambient noise into electrical energy using the EchoPower Box, an electromagnetic transducer employing N52-grade neodymium magnets. The research addresses the dual challenges of noise pollution and sustainable energy by designing a device that harnesses sound energy through electromagnetic induction. The prototype consists of a diaphragm, voice coil, magnets, and a rectifier- capacitor system to convert vibrations such as sound energy into stored electricity. Testing was conducted across four locations-the bazaar, library (IMC), classroom, and sidewalk-to evaluate voltage output under varying noise levels (51-89 dB). Results revealed an average output of 2.18 V, with the highest efficiency (51.1%) in the classroom (77.1 dB mean) and the lowest (8.81%) in the quieter IMC (52.8 dB). Statistical analysis (One-Way ANOVA, p< 0.001) confirmed significant differences in output across locations, with the sidewalk and classroom outperforming others. The study concludes that while the EchoPower Box demonstrates potential in noisy environments, its practicality is still limited by the location it is in. The researchers recommend minimizing diaphragm thickness, enhancing voice coil and magnet sensitivity, and testing in more controlled settings. This work contributes to acoustic energy harvesting as an improvement to prior studies.

Keywords: acoustic energy harvesting, electromagnetic induction, N52 neodymium magnets, noise pollution, sustainable energy