“…Many NICUs recommend that all jewellery, particularly rings, bracelets and wrist watches, should be removed below the elbows, as studies have shown them to increase bacterial colonization of hands. 4 As a further adjunct specifically aimed at visitors to the NICU, an audio message in the form of a WAV file was played by the computer after each press of the NICU's door bell (2-s latency period). As staff use swipe cards to enter and leave the NICU, it was anticipated that annoyance caused by the repetitive playing of the audio message would be kept to a minimum.…”