Sound to Electricity Conversion Using Electromagnetism

Abstract

INTRODUCTION

Renewable energy is an industry that is growing around the globe. It's a step away from greenhouse gas emission and a step forward to fighting climate change. Scientists are open to find new power sources without the harmful effects to our environment. Sound is a type of energy that is produced when things vibrate and is all around us. Since sound energy produces vibrations, electromagnetism was used. This study aims to convert sound to electricity using electromagnetism.

METHODS

The researcher created a device showing how sound played in a speaker was converted to electricity using a LED light as an indicator. The electromagnetism in a speaker was used to convert sound to electricity which is its original purpose but in reverse. The speaker was connected to a LED light and was tested if electricity would be converted by tapping the speaker, imitating the sound being played. An amplifier radio was connected to the speaker in order for it to play music and was connected to a battery source. The amount of sound was then measured using a mini sound level meter when the LED started to light up indicating electricity being converted and the amount of electricity was being measured using a multimeter.

RESULTS

The LED light lit up when the speaker was first tapped and when the radio was used to play different songs in its antenna indicating that there was conversion. When a song with a consistent tone and volume all throughout was played in the radio, the volume of the radio was slowly turned up until the LED lit up and it was when the music was playing at 107.4 dBA that the speaker converted 52 DCV at 12 mA.

DISCUSSIONS

The result shows how a speaker’s electromagnetism can covert sound to electricity, it also shows how much it can convert. By using the data in this research, it can help other researchers that are interested in delving into the conversion of sound. This could also help in opening up new ways and new topics in using energy sources that are safe for our environment. The study failed to convert sound that was already in the environment and used sound that was playing on a radio that was reliant to a power source. The study could be improved by using microphones that function similarly to speakers or using different means to convert sound.