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I Tried a $349 Headband That Hacks Your Brain for Better Sleep, and It Works.
The Elemind headband uses acoustic stimulation to guide your brain into sleep mode. Here's what happened when I tried it.
This high-tech headband changes your brainwaves to help you fall asleep faster — does it work?
I ducked out of the office to take a nap at a hotel — for journalism. Neurotech startup Elemind offered me the chance to try ...