Filtering of Noise in Audio/Voice Signal

Filter plays a vital role in electronics and communication system. Filters are used to pass the desired frequency signals and rejects undesired frequency signal. There are several applications where digital filtering techniques are used such as data communication, voice or audio filtering, video processing, image processing and many more. The basic idea behind this paper is to design different types of infinite impulse response digital filters such as Butterworth filter (BWF), Chebyshev type I filter (CSFT-1), Chebyshev type II filter (CSFT-2) and elliptic filter (EF) and to compare their performance to find out best suitable type for the filtering of voice signal, using LabVIEW simulation.