Synchronization of heart sounds with pulse from dorsalis pedis for S1 and S2 detection

A new S2 and S3 sound detection by using the heart rate signal taken from dorsalis pedis artery as a reference is presented in this paper. This approach aims to evaluate the accuracy of the S1 and S2 sounds detection by using dorsalis pedis pulse measurement as a reference. The dorsalis pedis pulse was measured by using MAX 30100 sensor controlled by a microcontroller. Meanwhile, the heart sounds were captured by using the ECG device. The measurement was taken for 5 minutes for a total of ten male and ten female subjects, with the age of 20 years old. This experiment has been conducted several times, and the average was calculated and compared to the existing solution. This proposed approach gives a small error compared to the standard S1 and S2 detection, leading it to be an acceptable and promising solution of a detection method.