Performance Evaluation of the Dreem 3 System for Sleep Assessment in Patients With Insomnia

Inclusion Criteria: * Subjects must be ≥ 22 and ≤ 70 years old inclusive. * Able to read, understand and sign an informed consent form. * Subjects with stable disease or/and taking stable medications for at least 2 months can be included under Principal Investigator or Sub-Investigator discretion * Self-reported insomnia symptoms (by means of a questionnaire completed by the participant before their visit to the sleep lab) as defined by International Classification of Sleep Disorders, third edition (ICSD-3), confirmed by a clinician. Exclusion Criteria: * Female subjects who are pregnant, or breastfeeding. * Subject under 22 and above 70 years old inclusive. * Not able to read, understand and sign an informed consent form * Subjects with BMI ≥ 40 * Taking medications that induce somnolence or wakefulness, or that can interfere with sleep recording: * If the subject is taking OTC medications that can induce somnolence or wakefulness, he/she must not take it the day of the measurement. * Prescription only drugs that induce somnolence or wakefulness must be stopped one week before, as PI or Sub-I discretion and/or review with subject's physician. * Subjects previously diagnosed with Obstructive Sleep Apnea (OSA), REM Sleep Disorder, Narcolepsy, Hypersomnia, or significant difficulty breathing due to underlying condition(s), or subjects diagnosed with Central Nervous System (CNS) disease. * Subjects that suffer from an unstable disease * Any incidental finding on the Polysomnography reference system, happening during the study recording, that interferes with eligibility (probable moderate/severe undiagnosed OSA) * Subjects who may experience fitting difficulties with the headband, including people with head circumference \< 53cm, or a hairstyle impeding the sensor placement (tight braids, hair extension, dreadlocks…) as determined by the investigator.