Abstract

The main objective of this project is to design an audio amplifier using digital and analog filtering techniques. An audio amplifier with analog filters was designed and tested earlier, but some noise persisted. Higher order analog filters remove all the noisy components from the circuit, but increase the complexity of the circuit. The need for less complex and more efficient circuit motivated us in using digital filtering techniques. In this project, an audio signal is given to an audio amplifier. The amplified analog output of this audio amplifier is then given to a Data Acquisition board (DAQ) for analog to digital conversion. The digital output from DAQ is then analyzed and filtered using LabVIEW 6.1 and MATLAB 6.1 programming. The filtered digital signal is then converted into analog signal and is fed to a speaker. The audio signal obtained would be completely noise free.

The timeline for this project is provided as Microsoft Project file. Please download  here.
(PLEASE RIGHT CLICK ON "HERE" AND CHOOSE "SAVE TARGET AS" TO SAVE THE FILE AND OPEN IN MICROSOFT PROJECT. )

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