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Noise measurements in incubators at neonatal intensive care unit
Blekinge Institute of Technology, School of Engineering, Department of Electrical Engineering.
Blekinge Institute of Technology, School of Engineering, Department of Electrical Engineering.
Blekinge Institute of Technology, School of Engineering, Department of Electrical Engineering.
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2012 (English)Conference paper, Published paper (Refereed)
Abstract [en]

The purpose of this study was to investigate the noise properties and levels of common noise sources in a neonatal intensive care unit (NICU) and in particular inside and around an incubator. Many previous studies have been made on noise levels in NICU, frequently focusing on A-weighted sound levels. In this study it was not assumed that infant's hearing follows the same equal loudness curve as adults and hence instead of A-weighting, short time averaged sound spectra in the frequency range 20 Hz to 20 kHz was logged to identify the frequency distribution of specific noise generating events. It was seen that alarms and CPAP air-flow increased the noise level by up to 8 dB outside but was barely noticed inside when considering the un-weighted noise level. However, by analyzing individual frequencies, most events were noticeable inside the incubator. For instance, frequencies above 1 kHz were increased by 10 dB inside and 11 dB outside the incubator when CPAP was turned on. Opening and closing the incubator increased the un-weighted noise level by 8 dB inside and 7 dB outside.

Place, publisher, year, edition, pages
Vilnius, 2012.
Keyword [en]
A-weighted sound levels, Frequency distributions, Frequency ranges, Neonatal intensive care units, Noise measurements, Noise properties, Sound spectrum, Time-averaged
National Category
Signal Processing Medical and Health Sciences
Identifiers
URN: urn:nbn:se:bth-6932Local ID: oai:bth.se:forskinfoE36CD52C9C7834D6C1257B9B00412E58ISBN: 9781622764655 (print)OAI: oai:DiVA.org:bth-6932DiVA: diva2:834487
Conference
19th International Congress on Sound and Vibration 2012, ICSV
Available from: 2013-07-01 Created: 2013-07-01 Last updated: 2017-03-13Bibliographically approved

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Magnus, BerggrenNilsson, KristianHåkansson, Lars

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
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