Experimental characterization of the human skin based on its natural frequency using a piezo-based sensor

The study emphasizes the importance of understanding the biomechanical properties of skin to maintain skin health and enable early disease detection. The research utilized piezo-based and optical position sensitive detector sensing methods to measure the skin’s natural frequency in vivo and non-invasively. A 3D-printed band with a piezo sensor was used to collect data, while COMSOL Multiphysics was employed for numerical analysis. Results showed piezo-sensing frequencies at 262.17 ± 2 Hz and optical-sensing frequencies at approximately 258.75 ± 4 Hz, with numerical analysis indicating a frequency of 269 Hz. The maximum deviation between experimental and numerical frequencies was within an acceptable error margin of 3.81%. The findings provide insights into skin properties, potentially enhancing the development of noninvasive diagnostic tools for early detection of skin diseases.