The aim of this study is comparing the influence of white music, earplug, music without lyrics on patients’ sleeping who were in CCU. This study is done in 2014 with 144 participants. They were hospitalized in C.C.U. in Tehran University of Medical Sciences hospitals. These participants had these characteristics. being in C.C.U at least for three nights because of coronary syndrome, obtaining score 5 or higher in sleeping quality questionnaire (sleeping disorder); homodynamic stability; not taking addictive drugs 5 or 6 hours before sleeping; not taking any anti-depressants, inotrope, amphetamine during the night; not having hearing disorder and not using ways affecting sleeping.
Participants were put in control and experimental group randomly. Participants having sever problems were out of study. The problems were as follows; homodynamic instability, unconsciousness, need to mechanical ventilation, cardiac pulmonary arrest. Patients in experimental group, received white music, earmuffs, music without lyrics that induces sleep. In order to measure quality and quantity of patients sleeping in this study. Petersburg sleeping quality questioners, Demographics form, sleeping quantity questioners(sleep log) are used and then 4groups are compared with each other.