The following is Zach’s summary of his project, cleverly titled “Speak to Me”. After being directed to speak into the headphones, visitors were pleasantly surprised to hear their own voice amplified back at them! As Zach was quick to point out, although they may not completely resemble one another, a loudspeaker is quite literally a microphone working in reverse. On display Zach presented his visitors with what looked to be an ordinary pair of headphones connected to a laptop computer. This led Zach to the discovery that microphones, as well as speakers, are able to convert sound energy into electrical energy and information using magnetism and magnetic fields. This led to the study of microphones, including the identification of each component and their functions. Zach began by researching the basic qualities of sound and how sound travels through mediums as waves. chose to explore whether a speaker, such as the kind you might find in a stereo or pair of headphones, could be converted into a working microphone. For this year’s Science Fair, Introductory Physics student Zachary B.
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