... of the incubator. The noise was reduced by 3.3 dBA inside the incubator. In a study by Blomkvist and colleagues [48], after the replacement of the ceiling tiles the noise level wasreduced by ... [53] to test the effect of night and day on infants in a newborn nursery. Besides turning off the radio, lights andcovering the windows with thick and dark curtains, the behaviour of the staff ... full in the Englishlanguage. Of the 167 papers found by the search strategy, 23 finallymet the inclusion criteria. A number of methods have beenapplied in those studies, including polysomnography,...