I Tested Brain-Adaptive Earbuds to See If They Could Improve My Sleep

I don't play about my sleep. My bedtime routine begins promptly at 9 p.m., at which point I make my way over to my red light mask, magnesium pillow spray, and a perfectly-curated playlist of ASMR. Up until now, I've solely relied on my Oura ring to see how well I slept the night before (don't talk to me if my readiness score is below an 80). But when I heard about a pair of brain-adaptive earbuds that could actually improve my sleep quality, I knew I had to try them for myself. Most similar wearable devices track sleep by measuring cardiovascular changes via light sensors. This method is known . . .