Spectral analysis of noise in the neonatal intensive care unit
Rent the article at a discountRent now
* Final gross prices may vary according to local VAT.Get Access
To perform spectral analysis of noise generated by equipments and activities in a level III neonatal intensive care unit (NICU) and measure the real time sequential hourly noise levels over a 15 day period.
Noise generated in the NICU by individual equipments and activities were recorded with a digital spectral sound analyzer to perform spectral analysis over 0.5–8 KHz. Sequential hourly noise level measurements in all the rooms of the NICU were done for 15 days using a digital sound pressure level meter. Independent sample t test and one way ANOVA were used to examine the statistical significance of the results. The study has a 90% power to detect at least 4 dB differences from the recommended maximum of 50 dB with 95 % confidence.
The mean noise levels in the ventilator room and stable room were 19.99 dB (A) sound pressure level (SPL) and 11.81 dB (A) SPL higher than the maximum recommended of 50 dB (A) respectively (p < 0.001). The equipments generated 19.11 dB SPL higher than the recommended norms in 1–8 KHz spectrum. The activities generated 21.49 dB SPL higher than the recommended norms in 1–8 KHz spectrum (p< 0.001). The ventilator and nebulisers produced excess noise of 8.5 dB SPL at the 0.5 KHz spectrum.
Noise level in the NICU is unacceptably high. Spectral analysis of equipment and activity noise have shown noise predominantly in the 1–8 KHz spectrum. These levels warrant immediate implementation of noise reduction protocols as a standard of care in the NICU.
- White, R.D. (2003) Recommended standards for newborn ICU design. J Perinatology 23: pp. 5-21
- Johnson, A.N. (2001) Neonatal response to control of noise inside the incubator. Pediatric Nurs 27: pp. 600-605
- Chang, E.F., Machael, M.M. (2003) Environment noise retards auditory cortical development. Science 300: pp. 498-502 CrossRef
- Slevin, M., Farrington, N., Duffy, G., Daly, L., Murphy, J.F. (2000) Altering the NICU and measuring infant’s responses. Acta Pediatr 89: pp. 577-581 CrossRef
- Vivek, G., Soodan, K.S., Girish, G., Vishal, S., Nair, M.N.G. (2005) Evaluation of sound pressure level in NICU. J Neonatogy 19: pp. 155-159
- Robertson, A., Kohn, J., Vos, P., Cooper-Peel, C. (1998) Establishing a noise measurement protocol for neonatal intensive care units. J Perinatology 18: pp. 126-130
- Guimaraes, H., Oliveira, A.M., Spratley, J., Mateus, M., d’orey, C., Coelho, J.L., Souto, A., Santos, N.T. (1996) The noise in neonatal intensive care units. Arch Pediatr 3: pp. 1065-1068 CrossRef
- Benini, F., Magnavita, V., Lago, P., Arsian, E., Pisan, P. (1996) Evaluation of noise in the neonatal intensive care unit. Am J Perinatology 13: pp. 37-41 CrossRef
- Nzama, N.P., Nolte, A.G., Dorfling, C.S. (1995) Noise in a neonatal unit: Guidelines for the reduction or prevention of noise. Curationis 18: pp. 16-21
- Robertson, A., Cooper-Peel, V. P. (1999) Sound transmission into incubators in the neonatal intensive care unit. J Perinatology 19: pp. 494-497 CrossRef
- Jonckheer, P., Robert, M., Aubry, J.C., Brouwer, C. (2004) Noise in neonatology: The impact of hospital staff. Presse Med 33: pp. 1421-1424 CrossRef
- Chang, Y.J., Lin, C.H., Lin, L.H. (2001) Noise and related events in a neonatal intensive care unit. Acta Paediatr Taiwan 42: pp. 212-217
- Kathleen, M., Philbin, R.N. (2004) Planning the acoustic environment of a neonatal intensive care unit. Clinics in Perinatology 31: pp. 331-352 CrossRef
- Spectral analysis of noise in the neonatal intensive care unit
The Indian Journal of Pediatrics
Volume 75, Issue 3 , pp 217-222
- Cover Date
- Print ISSN
- Online ISSN
- Additional Links
- Noise in neonatal intensive care unit (NICU)
- Industry Sectors
- Author Affiliations
- 1. St John’s Medical College Hospital, Bangalore, India
- 3. Department of Otolaryngology Head and Neck Surgery, St. John’s Medical College Hospital, Bangalore, 560 034, India
- 2. Medical intelligence and language engineering laboratory, Department of Electrical engineering, Indian Institute of Science, Bangalore, India