IRCT201304027529N3 IRCT 2013-05-04 Shahed University The effect of sound therapy on agitation and anxiety The effect of sounds therapy on agitation and anxiety in patients undergoing coronary artery bypass graft during the weaning of mechanical ventilation 2012-12-21 anticipated 120 Complete https://irct.ir/trial/8012 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Supportive. N/A Generalized anxiety disorder. Intervention 1: The patients in the experimental group were given nature-based sounds (birds’ song, soothing rain sounds, river stream) through an audiotape via fixed earphones, then 20 min rest. This is done until extubation. The nature sounds were played using a MP3 media player ( Leono Inc., Guangzhou, China) through disposable foam-lined headphones The average sound pressure level was set to 25-50 dB. For all samples is recording anxiety and agitation score. Intervention 2: The patients assigned to the control group were asked to wear the foam-lined headphone and rest in silence for a similar time frame as the intervention group to minimize unpleasant environmental noises or stimuli.