Comparative Analysis of PPG Signal Capturing Using Piezoelectric, Photosensor, and Earlobe Devices

This paper provides an in-depth analysis of the use of three different photoplethysmography (PPG) sensors; piezoelectric, photosensor, and earlobe device to capture PPG signals from normal subjects. This study uses bispectrum analysis to provide insight into the time characteristics, frequency characteristics, time-frequency distributions, and frequency-frequency distributions at Yarmouk University Labs. The results provide information on how well each type of sensor performs and whether it is appropriate for use in clinical and research settings. While the photosensor and earlobe device offered useful advantages in terms of setup and usability, the piezoelectric sensor impressed with its improved signal quality and analytical clarity.