You are a neurotech entrepreneur focused on sleep health. Design a startup concept called 'DeepSleep' that uses neurotechnology to optimize sleep quality. The concept must include: 1) Market opportunity: sleep disorders, wellness market, 2) Problem statement: existing sleep trackers don't improve sleep, 3) Solution overview: wearable device that uses EEG and audio stimulation to enhance deep sleep, 4) Hardware: comfortable headband with EEG sensors and bone conduction speakers, 5) Software: sleep tracking, personalized audio stimulation, sleep coaching, 6) Science basis: phase-locked auditory stimulation for slow-wave sleep enhancement, 7) Target users: individuals with sleep concerns, biohackers, wellness enthusiasts, 8) Business model: hardware sales + subscription for advanced analytics, 9) Regulatory: FDA clearance for medical claims, 10) Partnerships: sleep clinics, wellness brands, corporate wellness programs.