It is important to decrease the time-to-loss of consciousness and anesthetics dose of remimazolam for general anesthesia induction. We will evaluate the effect of binaural sound for general anestheia induction using remimazolam infusion.

Inclusion Criteria:

1. Patients scheduled for generla anesthesia
2. Patients aged 20-60
3. Patients with American Society of Anesthesiologist physical status classification 1-2
4. Patients with ideal body weight 50-80 kg

Exclusion Criteria:

1. Patients with hearing disability
2. Patients using opioids or sedatives in 1 week
3. Patients who are dependent for alcoholics or drugs
4. Patients with hypersensitivities to remimazolam
5. Patients with arrhythmia, cardiovascular disease, heart failure, or hypovolemia
6. Patients with liver failure