Photoplethysmography-Based In-Ear Sensor System for Identification of Increased Stress Arousal in Everyday Life

Markus Lueken1, Xiaowei Feng, Boudewijn Venema2, Berno Misgeld1, Steffen Leonhardt

  • 1RWTH Aachen University
  • 2Philips Chair for Medical Information Technology, RWTH Aachen University



Contributed Papers (Oral)


11:30 - 12:15 | Wed 10 May | Einstein Auditorium | WeBT1

Technical Session 2 – Monitoring Stress and Activation

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In this work, we present an in-ear system for physiological and psychological stress detection based on photoplethysmography, acceleration, and temperature measurements. The complete system is used to extract vital signs from healthy subjects, who are exposed to psychologically demanding tasks. The newly developed sensor system is integrated into our IPANEMA body sensor network and, thus, can be used in combination with several sensor modalities. The capability of the stress level estimation is validated in an human stress experiment. To obtain information on the current stress level, several well-known indicators are utilized like the heart rate variability, surgical stress index or the Oliva and Roztocil index.

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