Inclusion Criteria:  Patients between 40 and 70 years old Hospitalized for a coronary bypass That has given his written consent Affiliated to a French social security system or entitled to a social security benefit.  Exclusion Criteria:  Emergency coronary bypass surgery Impaired ventricular function (ejection fraction < 45%) Combined surgery Patient with chronic dialysis Diagnosed with severe depression Patient in a psychotic state Patient with chronic pain Patient incapable of giving his written consent Patient deprived of liberty by judicial decision or benefiting from legal protection (under guardianship or curatorship) Patient on AME Participation in other interventional research involving humans, or being in the period of exclusion from previous research involving humans, if applicable. Pregnant or breastfeeding woman Patient with pacemaker Patient with implanted metallic medical devices Recently operated patient Patient with hearing epilepsy Tinnitus patient