Evaluation of Sound Pressure Level in NICU

Safe acoustic in NICU environment is extremely crucial for the best outcome of the neonates. This study was designed to answer the research question of the sound pressure levels (SPL) produced by various relevant variables in NICU.

The study was conducted in a NICU of a tertiary care hospital. Sound level meter – 2231 was used for measuring SPL. At the beginning SPL of external enviornment and vacant NICU were measured. Sound produced by various equipments, appliances, personnel and other events in NICU was measured at various distances from the source. 3-5 readings were recorded for each event. Data was analysed statistically for significance.

SPLs in the vacant NICU was found within the normal limits. Baseline average SPL in the NICU was 51decibels. Average SPL in the NICU remained between 60-80 decibels. Maximum recorded SPL in the NICU was 102 decibels produced by falling of katori.

This study showed that existing NICU environment has SPL in the range far from safety, at times in the dangerous zone.