Safety and Performance Study of the Electroencephalographic Recording Device and Sound Emissions

Inclusion Criteria: * Subject presenting a mild cognitive disorder of the amnesic type, defined by a memory complaint, a Mini Mental State ≥ 24 and a score ≤26 on free recall or ≤45 / 48 on total recall) of the RLRI16 episodic verbal memory test * At least 7 years of schooling Exclusion Criteria: * Severe psychiatric pathology * Known neurological pathology * High risk of apnea syndrome defined by at least 2 positive categories (each with a score ≥2) on the Berlin Questionnaire for Apnea Syndrome Screening * High risk of behavioral disorder in REM sleep defined by an RBDSQ score\> 5. * Taking sleeping pills or antidepressants * Severe heart disease or unbalanced diabetes