Wavelet Transform analysis of the normal cardiac sounds

Abstract

The objective of the present paper is a synthesis study of the Fast Fourier Transform (FFT) and the Wavelet Transform (WT) in analysing the first and the second heartbeat signals of the phonocardiagram (PCG). It is shown that the wavelet Transform provide a good time-frequency representation and enough features of the PCG signal that will help physician to obtain qualitative and quantitative measurements and consequently aid to diagnosis. Similarly, it is shown that the frequency content of such a signal can be determined by the FFT only without difficulties.