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Vol. 84, No. 4, 2003
Issue release date: November 2003
Section title: Original Paper
Biol Neonate 2003;84:293–296
(DOI:10.1159/000073637)

Use of Sound-Absorbing Panel to Reduce Noisy Incubator Reverberating Effects

Bellieni C.V.a · Buonocore G.a · Pinto I.b · Stacchini N.b · Cordelli D.M.a · Bagnoli F.a
aDepartment of Pediatrics, Obstetrics and Reproduction Medicine, University of Siena, and bDepartment of Prevention, Physical Laboratory, ASL 7, Siena, Italy

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: 3/26/2003
Published online: 11/7/2003
Issue release date: November 2003

Number of Print Pages: 4
Number of Figures: 1
Number of Tables: 1

ISSN: 1661-7800 (Print)
eISSN: 1661-7819 (Online)

For additional information: http://www.karger.com/NEO

Abstract

Objectives: To assess the amplification and distortion of noise in incubators by measuring noise levels from various sources under various conditions. Study Design: We recorded sound pressure levels (SPL) of background noise, baby crying, alarms and porthole closing with the incubator hood open or closed. Then we tried to reduce the sound level in the incubator by applying a sound absorbing panel to the ceiling of the hood. Results: The sound sources analysed produced very high SPL. In free field baby crying and porthole noise were, respectively, 81–83 dB and 70–71 dB, closing the hood they raised to 84–87 and 73–74 dB: this means that the noise perceived by a baby in the incubator had twice the SPL of the same noise emitted in a free field; alarm noise was 56–57 dB inside incubators. Sound emitted inside the hood was also distorted, i.e. it had different features from the same source in a free field. The insulating panel prevented amplification and distortion due to the hood and reduced the SPL of alarms. Only background noise did not decrease with the panel. Sound absorbing panel reduced baby’s crying, porthole noise and alarm noise SPL to 82–85, 70–71 and 50–51 dB, respectively. Conclusions: Incubators are reverberating environments, which amplify the baby’s cry and other noises produced inside the hood. The frequency components of noises are altered by the hood. The sound absorbing panel reduced this phenomenon.

© 2003 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: 3/26/2003
Published online: 11/7/2003
Issue release date: November 2003

Number of Print Pages: 4
Number of Figures: 1
Number of Tables: 1

ISSN: 1661-7800 (Print)
eISSN: 1661-7819 (Online)

For additional information: http://www.karger.com/NEO


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Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
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