ISSN : 2319-7323

INTERNATIONAL JOURNAL OF COMPUTER SCIENCE ENGINEERING

ABSTRACT

Title	:	Audio Signal Noise Reduction using Low Pass Filter
Authors	:	Shaveta Arora
Keywords	:	Noise, low-pass filter, elliptic filter, butterworth filter, Chebyshev filter
Issue Date	:	May-Jun 2021
Abstract	:	This paper elucidates designing of filters to reduce noise from an audio or speech signal. Such kind of signal may contain random noise which can get added from surroundings while transmission. Various filters are used to remove different kinds of noise. A low pass filter (LPF) is used to remove high frequency noise from the signal and preserves the low frequency components in the signal. Whereas a high pass filter is used to remove low frequency noise and preserves the high pas components. A bandpass filter is used to allow only a range of frequencies by taking human threshold voice. In this paper, we are using a low pass IIR (Infinite Impulse Response) and FIR (Finite Impulse Response) filter to remove noise from an audio signal. This LPF is designed on Filter Design and Analysis Toolbox in MATLAB. Butterworth, Chebyshev type-II and Elliptic low-pass filters are used for noise reduction and results are compared using signal to noise ratio (SNR) and mean square error (MSE).
Page(s)	:	46-49
ISSN	:	2319-7323
Source	:	Vol. 10, No. 3