Labs Idea #4: Pulse Monitor with Differential Pressure Sensor
Wearables measuring heart rate is a growing trend. Mostly the pulse is measured with photoplethysmography (PPG) using LEDs and photo diodes. However, dirt on the optics, dark skin or tatoos can make PPG based pulse measurement on the wrist difficult. A very sensitive differential pressure sensor can detect the air wave generated by the pulse wave in the artery or carotid. Thus, it is possible to detect the heart rate independent of skin color or tattoos.
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