Fig. 1From: Noise in the intensive care unit and its influence on sleep quality: a multicenter observational study in Dutch intensive care unitsThe 24-h average sound pressure levels (LAeq,24h) for three recording periods: all (24 h, midnight to midnight); day (from 7 a.m. to 11 p.m.); night (from 11 p.m. to 7 a.m.)Back to article page