Audio Speaker Utilizing the Controlled Modulation of an Electrical Discharge

Sommer, Aaron (2011) Audio Speaker Utilizing the Controlled Modulation of an Electrical Discharge. [Abstract]

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Abstract

A method for producing high fidelity audio was explored utilizing a mass less speaker. The design explored the best course of action regarding discharge type, modulation scheme and transformer construction. Specifically, a point to point discharge between two fixed electrodes was utilized. An audio signal modulated a fixed frequency, transformer driving, square wave using pulse width modulation. This signal was adequately amplified using a configuration of MOSFET(s). The duly amplified signal powered the primary winding of a high power, high turn ratio transformer. The audio producing electrical arc was maintained across the secondary winding of the transformer. The audio output was tested using a high quality microphone and a fixed frequency, sine wave input. An oscilloscope was used to perform an immediate Fourier transform. By analyzing the output in the frequency domain a quantitative measurement of total harmonic distortion plus noise was made. The audio was tested at various frequencies and averaged to give a total THD+N measurement.

Item Type: Abstract
Created by Student or Faculty: Student
Additional Information: 6th Annual Natural & Behavioral Sciences Undergraduate Research Symposium Program
Uncontrolled Keywords: Audio Speaker, Controlled Modulation, Electrical Discharge, Metal–Oxide–Semiconductor field-Effect Transistor (MOSFET), Noise, Modulation (electronics)
Subjects: School of Natural and Behavioral Sciences > Engineering
NBS Symposium
School of Natural and Behavioral Sciences > Physics
Depositing User: Alejandro Marquez
Date Deposited: 07 Jun 2013 14:34
Last Modified: 07 Jun 2013 14:34
URI: http://eprints.fortlewis.edu/id/eprint/370


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