Mechano-acoustic sensing of physiological processes and body motions via a soft wireless device placed at the suprasternal notch.

Journal Article (Journal Article)

Skin-mounted soft electronics that incorporate high-bandwidth triaxial accelerometers can capture broad classes of physiologically relevant information, including mechano-acoustic signatures of underlying body processes (such as those measured by a stethoscope) and precision kinematics of core-body motions. Here, we describe a wireless device designed to be conformally placed on the suprasternal notch for the continuous measurement of mechano-acoustic signals, from subtle vibrations of the skin at accelerations of around 10-3  m s-2 to large motions of the entire body at about 10 m s-2 , and at frequencies up to around 800 Hz. Because the measurements are a complex superposition of signals that arise from locomotion, body orientation, swallowing, respiration, cardiac activity, vocal-fold vibrations and other sources, we exploited frequency-domain analysis and machine learning to obtain-from human subjects during natural daily activities and exercise-real-time recordings of heart rate, respiration rate, energy intensity and other essential vital signs, as well as talking time and cadence, swallow counts and patterns, and other unconventional biomarkers. We also used the device in sleep laboratories and validated the measurements using polysomnography.

Full Text

Duke Authors

Cited Authors

  • Lee, K; Ni, X; Lee, JY; Arafa, H; Pe, DJ; Xu, S; Avila, R; Irie, M; Lee, JH; Easterlin, RL; Kim, DH; Chung, HU; Olabisi, OO; Getaneh, S; Chung, E; Hill, M; Bell, J; Jang, H; Liu, C; Park, JB; Kim, J; Kim, SB; Mehta, S; Pharr, M; Tzavelis, A; Reeder, JT; Huang, I; Deng, Y; Xie, Z; Davies, CR; Huang, Y; Rogers, JA

Published Date

  • February 2020

Published In

Volume / Issue

  • 4 / 2

Start / End Page

  • 148 - 158

PubMed ID

  • 31768002

Pubmed Central ID

  • PMC7035153

Electronic International Standard Serial Number (EISSN)

  • 2157-846X

International Standard Serial Number (ISSN)

  • 2157-846X

Digital Object Identifier (DOI)

  • 10.1038/s41551-019-0480-6


  • eng