Anyone else notice that their polar HRM strap makes noise when it's picking up your pulse? Put it on in a quiet place. You don't even need the watch/computer part to be near you, or even on. Just put it on and listen. It produces a very quiet, high pitched beep, everytime your heart beats.
Anyone know how these things work? I guess it senses the electrical signal from your heart firing somehow, but anyone know the details of the sensors used? Why would it produce noise? My roomates have noticed similar sounds from computers when the wheel magnet goes by the sensor, so if those things are related its not HRM specific, but something in the electronics that both of those components would have. There's got to be some EE's out here... whats up??
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The strap works as an electrode and uses radio signals to be able to measure the electrical activity of your heart.
The sensor can be affected by close proximity to electromagnetic radiation from drills, televisions, etc.
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