Patent ID: 7691049

Claim:
A handheld, portable biofeedback device for reducing stress in a human subject comprising: a housing: a photoplethysmograph sensor disposed in the housing, wherein the photoplethysmograph sensor generates data from the human subject; a control system coupled to the photoplethysmograph sensor; and a display screen, wherein the control system is configured to process the data from the human subject to form output data for output to the display screen, the output data providing the human subject with information associated with the human subject's stress level; and wherein the housing, photoplethysmograph sensor, control system and display screen form an integrated structure; wherein the data generated from the human subject includes a wave, having a top and a bottom; and wherein, whenever the wave has double tops or double bottoms, the control system is further configured to merge together the double tops or the double bottoms.