This quantitative, descriptive, and exploratory study aimed to identify sound pressure levels and their sources in university hospital delivery rooms in Brazil. Data was collected between October, 2008, and July, 2009. A dosimeter was used to register noise and non-structured observation was used to identify noise sources. Noise and source observations were registered over 2928 minutes. Mean equivalent sound levels (Leq) were measured using Quest Suit software. Mean Leq values were identified as 69.6 dBA (± 3.69) during vaginal deliveries and 65.4 dBA (± 2.28) during cesarean deliveries. The most frequent noise source was conversation among professionals in the room. Considering the high levels of sound pressure and the sources, this study points out the need for intervention through educational programs among professionals and students to minimize noise and improve the care provided to the newborn and his/her family, as well as professional working conditions.
Noise; Humanized delivery; Newborn
