Epidermal Electronics

A human interacts with the environment and others and generates mechano-acoustic (MA) signals that contain critical information about bioactivities. Most of the signals attenuate at the skin-air interface but epidermal electronics create a path to capture them. We have invented a wearable mechano-acoustic (MA) sensing technique, which is a wireless, soft, skin-mounted electronic system that incorporates MEMS accelerometers with capabilities of recording body kinematics, along with multimodal MA signatures of underlying body processes, similar to those captured with a stethoscope. Our work focuses on engineering the conformal form of mechano-acoustic detection at anatomy positions of interest, especially those hard for conventional wearable devices with rigid, planar form factors to couple to. The aim is to capture a multitude of human-body mechanics to decode human actions or status in high dimensions. We also work on frequency-domain analysis and machine learning approaches to interpret the networked, high-density MA data streams for advanced monitoring modalities, such as in-vivo, constitutive characterizations of tissues and organs. The goal is to investigate broad classes of biomechanical processes and their inference of the underlying functional properties of the mechanical body.

  

Selected publications:

K. Lee, X. Ni, J.Y. Lee, H. Arafa, D. Pe, S. Xu, R. Avila, M. Irie, J.H. Lee, R.L. Easterlin, D.H. Kim, H.U. Chung, O.O. Olabisi, S. Getaneh, E. Chung, M. Hill, J. Bell, H.K. Jang, C. Liu, J.B. Park, J. Kim, S.B. Kim, S. Mehta, M. Pharr, A. Tzavelis, J.T. Reeder, I. Huang, Y. Deng, Z. Xie*, C.R. Davies*, Y. Huang*, and J.A. Rogers*, "Mechano-acoustic sensing of physiological processes and body motions using soft, wireless devices interfaced to the skin at the suprasternal notch", Nature Biomedical Engineering 4, 148–158 (2020)