Calm technology for biofeedback : why and how?

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    We discuss several possibilities and fundamental difficulties when designing biofeedback systems based on calm technology. As a carrier for the discussion we develop a novel biofeedback installation based on heart rate variability. The system is built-in to an elegant table and gives visual feedforward or feedback for relaxation based on breathing. When in feed-forward mode, the system will show a sine wave of about 7 cycles per second, close to the well-known resonant breathing frequency. Alternatively, the amplitude of the movement can give feedback on the heart rate variability level, which is known to be directly associated with a reduced level of mental stress. The demonstrator has a pulse- plethysmography sensor which measures the beat-to-beat intervals of successive heart beats. The mechanical design of the actuator is designed to operate completely noise-less. Both the adaptive algorithm and the actuator are new to the best of our knowledge. Still new fundamental questions arise.
    Original languageEnglish
    Title of host publicationProceedings of the Conference on design and Semantics of Form and Movement - Sense and Sensivity, DeSForM 2017
    EditorsM. Bruns Alonso, E. Özcan
    Number of pages12
    ISBN (Electronic)978-953-51-3588-3
    ISBN (Print)978-953-51-3587-6
    Publication statusPublished - 18 Oct 2017


    • Biofeedback, breathing, active surface, data visualization, real-time, calm technology.


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