This paper represents a brief description of various types of filters used for the elimination of noise in audio/voice signal. The main objective of this survey paper is to find the better optimize filter which is used to provide the desire signal without any interference. Filtering is used in most digital signal processor applications to pass required frequency and stop unwanted frequency. There are many applications where digital filters are used such as voice/audio filtering, image processing and video processing and many more. In most applications filters are used to improve the performance of the desire signal. The idea of this paper is to analyze and compare the performance of IIR and FIR filters, and observe the signal free of interference.
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