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(L) How tandem photodiode monitors heart and respiration rates; (R) Detected heart and respiration signals.
In the left image we see the set-up in which the new tandem photodiode can be used to monitor the heart and respiration rates of a person. The right images show the detected heart and respiration signals recorded with the photodiode at a distance of 130 cm. Image: courtesy of TU/e & TNO.
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