Determination of Variations in Heart Sound Caused After Passing through Stethoscope Tube in Two Wired and Wireless Status

The present paper was formulated in order to determine sound passing status from various channels and present a novel method sound transfer considering a few qualitative and quantitative attributes of sound as well as software analysis through wavelet transform. The present paper didnʹt make use of an independent sound of ECG-type as a reference. Furthermore, unlike previously presented algorithms where heart signal was adopted as a benchmark for healthfulness of the patient, the present work considered pressure difference around heart valves causing high-frequency characteristics in the formed signal. Stethoscope tip was steadily used in all specimens while variables such as presence or lack of tube as well as sound transfer channel to wired and wireless processing system were considered. The tube had a considerable role in sound intensity and frequency resulting in higher auditory quality. The results obtained from the present study can be very efficient in designing new generations of medical stethoscopes.