[Workers' knowledge and perception regarding noise in the neonatal unit].

The objective of the study was to assess the knowledge and perception of professionals working in a Neonatal Intensive Care Unit (NICU) regarding the repercussions of noise on the neonates, families and workers, prior to the implementation of an educational program. This qualitative descriptive study was conducted in a NICU of a São Paulo hospital with 101 professionals. A questionnaire was used for data collection, and chi-square and Student's t test were used to determine the association between variables. The workers described the NICU as very noisy (44.9%); they noticed the effects of noise during and after their work shift (67.4%) and used strategies to reduce noise. Despite not being familiar with legislation regarding noise in the hospital, the workers identify its repercussions on themselves, the neonates and families. Results indicate the need to teach the staff about legislation and noise prevention, as well as reorganize healthcare practices and Neonatal Intensive Care Unit facilities.