PURPOSE: Elevated sound levels in the NICU may contribute to undesirable physiologic and behavioral effects in preterm infants. This study describes sound levels in a busy NICU in the southeastern U.S. and compares the findings with recommended NICU noise level standards. DESIGN: NICU sound levels were recorded continuously at nine different locations within the NICU. Hourly measurements of loudness equivalent (Leq) sound level, sound level exceeded 10 percent of the time (L10), and maximum sound level (Lmax) were determined. SAMPLE: Sound levels were sampled from nine different locations within the NICU. MAIN OUTCOME VARIABLE: Sound levels are described using the hourly, A-weighted Leq, L10, and Lmax. RESULTS: The overall average hourly Leq (M = 60.44 dB, range = 55-68 dB), L10 (M = 59.26 dB, range = 55-66 dB), and Lmax (M = 78.39, range = 69-93 dB) were often above the recommended sound levels (hourly Leq <50 dB, L10 <55 dB, and 1-second Lmax <70 dB). In addition, certain times of day, such as 6-7 AM and 10 AM-12 noon, were noisier than other times of day.
PURPOSE: Elevated sound levels in the NICU may contribute to undesirable physiologic and behavioral effects in preterm infants. This study describes sound levels in a busy NICU in the southeastern U.S. and compares the findings with recommended NICU noise level standards. DESIGN: NICU sound levels were recorded continuously at nine different locations within the NICU. Hourly measurements of loudness equivalent (Leq) sound level, sound level exceeded 10 percent of the time (L10), and maximum sound level (Lmax) were determined. SAMPLE: Sound levels were sampled from nine different locations within the NICU. MAIN OUTCOME VARIABLE: Sound levels are described using the hourly, A-weighted Leq, L10, and Lmax. RESULTS: The overall average hourly Leq (M = 60.44 dB, range = 55-68 dB), L10 (M = 59.26 dB, range = 55-66 dB), and Lmax (M = 78.39, range = 69-93 dB) were often above the recommended sound levels (hourly Leq <50 dB, L10 <55 dB, and 1-second Lmax <70 dB). In addition, certain times of day, such as 6-7 AM and 10 AM-12 noon, were noisier than other times of day.
Authors: Ganna Raboshchuk; Climent Nadeu; Peter Jancovic; Alex Peiro Lilja; Munevver Kokuer; Blanca Munoz Mahamud; Ana Riverola De Veciana Journal: IEEE J Transl Eng Health Med Date: 2017-12-22 Impact factor: 3.316
Authors: Lara Liszka; Joan Smith; Amit Mathur; Bradley L Schlaggar; Graham Colditz; Roberta Pineda Journal: Early Hum Dev Date: 2019-07-09 Impact factor: 2.079