Respiratory Heart Rate Piezoelectric Sensor Nursing Home Hospital Smart Mattress Breathing Belt Sleep Belt to monitor respiration rate

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»