Inclusion criteria : Elective surgeries, patient satisfaction, conscious patients, no history of epilepsy, patients over 18 years old, no heart dysrhythmias, non-pregnant female patients, no neurological and psychiatric disorders, no use of anti-anxiety drugs, no drug opioid addiction, no Alcohol consumption in the past 12 hours, healthy hearing, no ear infection, no patient agitation, no history of chronic pain, no uncontrollable anxiety in the patient.
Exclusion criteria: Urgency of surgery, occurrence of any unstable and severe hemodynamic changes after hearing the sound, unwillingness of the patient to continue the research, blood pressure above 140/100, disturbance in surgery due to equipment and technique, prolongation of surgery more than usual, use of anti hypertensive drugs Pain and anxiety during surgery