Nitrous oxide sedation with auditory modification.
D001307:Auditory Perception / Q000187:drug effects*; D006801:Humans; D006993:Hypnotics and Sedatives / Q000494:pharmacology; D009609:Nitrous Oxide / Q000494:pharmacology*; D009622:Noise; D012063:Relaxation; D012064:Relaxation Therapy / Q000379:methods
D006993:Hypnotics and Sedatives; D009609:Nitrous Oxide