Doppel heartbeat-simulating wearable(Credit: Will Shanklin/New Atlas) Wearable tech is often associated with smartwatches and fitness trackers, but we’ve also seen a niche group of consumer products aimed at regulating emotions. While it’s an area ripe for a placebo effect, we found Doppel, a heartbeat-simulating wrist wearable, to be curious enough to demo at CES 2017. The idea behind...