Performing discrete fourier transform of the heart sounds on the pocket computer

Abstract

The heart is one of the two significant organs for human life. Today the most important method used by the medical doctors in diagnosing the disorders in connection with the heart is listening with the stethoscope. The sounds created by the flow of the blood entering the heart and movements of the valvular connected to the flow are listened and then the anormalities related to the heart are determined. On the other hand, the method of listening with the stethoscope has many constrains. In this study, from the heart sounds taken from the patient via electronic stethoscope digital data have been acquired, and with the discrete Fourier transform, which is one of the signal processing methods, frequency analysis has been performed, and both sound graphic and frequency spectrum have been displayed on the pocket computer. Thus, examining the frequency spectrum of the normal and anormal heart sounds, it is thought that the differences on the frequency axis of the normal and anormal sounds may be beneficial in diagnosing. Because unlike normal heart sounds, the diseased heart sounds taken from a patient who has any kind of heart disorder include higher frequency components. As the developed system can be operated in a mobile way, it is appropriate for the medical doctors to use it in clinical practically.