Noise Reduction and Speech Enhancement Basic methods and their improvements

This paper is the final report of the EECS451 project. In this project, several audio enhancement methods are researched and implemented in MATLAB to reduce the noise in poorly recorded speech and reach a better signal-to-noise ratio. Improvement is applied to the basic spectral reduction algorithms. Issues of the trade off in this method and side effect included are also discussed. Keywords—Butterworth; spectral subtraction; MATLAB; audio enhancement;