Last Updated on March 29, 2024 by pg@petergamma.org This video shows a more basic sensor: below the video: https://www.sciencebuddies.org/science-fair-projects/project-ideas/HumBio_p055/human-biology-health/train-belly-breathing «Respiratory Heart Rate Piezoelectric Sensor Nursing Home Hospital Smart Mattress Breathing Belt Sleep Belt»
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