METHOD AND APPARATUS FOR ROBUST HEART RATE SENSING
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Abstract
A heart rate sensing system (300) includes a light source (112, 310, 1008, 1110) a light detector (114, 1010, 1112) and a pressure sensor (116, 1012, 1114) held by a compressible comformable resilient pad (110, 1006, 1108) against a wearers body (202). A signal from the pressure sensor is used to alter the amplitude of a signal detected by the light source in order to reduce motion artifacts. The system can be incorporated into an article, such as an ear cuff (100), an audio headset (1000) or a set of headphones (1100), that is suitable for use by an active user.
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Citations
22 Claims
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1-15. -15. (canceled)
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16. A heart rate sensing system comprising:
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an optical detection subsystem comprising an optical source for illuminating a body part with optical radiation, and an optical sensor for detecting said optical radiation after said optical radiation has been modulated by a physiological phenomenon occurring in said body part that is correlated with a heart beat, wherein said optical sensor produces a first signal; a secondary sensor for sensing a second signal that is correlated with a noise component of said first signal, wherein said second signal is coupled into said optical detection subsystem in such manner as to effect an amplitude of said first signal. - View Dependent Claims (17, 18, 19, 20, 21)
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22-34. -34. (canceled)
Specification