Noise analysis of three newborn infant isolettes.
Noise analysis of three newborn infant isolettes.
复制标题
三个新生儿孤岛的噪声分析。
作者：
R. Berens;C. Weigle
目的
本研究的目的是评估三个新生儿隔离器的噪声。
研究设计
一项观察性前瞻性研究评价了三个隔离器（Ohmeda、Air Shields和Drager）中的噪声。该研究测量了安静噪声情况下的内部isolette噪声产生以及添加的低频和高频噪声的isolette噪声衰减。噪声是在分贝A标度和125赫兹和1000赫兹波段测量的。
结果
在安静条件下，Ohmeda和Drager isolettes具有基于分贝A水平的最小噪声产生（p < 0.001）。尽管总体差异在临床上可能不显著，但Drager isolette对分贝A标度上的低频噪声衰减最大（p < 0.001）。Ohmeda隔离器在分贝A标度上测量的高频噪声衰减28.4 dB，大于Drager（22.8 dB）和Air Shields（14 dB）隔离器的值（p < 0.001）。
结论
Ohmeda和Drager isolette的高频噪声衰减在临床上和统计学上大于Air Shields isolette的高频噪声衰减。
OBJECTIVE
The purpose of this study was to evaluate the noise of three newborn infant isolettes.
STUDY DESIGN
An observational, prospective study evaluated noise in three isolettes (Ohmeda, Air Shields, and Drager). The study measured interior isolette noise production during quiet noise situations and isolette noise attenuation of added low- and high-frequency noise. Noise was measured on the decibel A scale and in the 125 Hz and 1000 Hz bands.
RESULTS
During quiet conditions the Ohmeda and Drager isolettes had the least noise production on the basis of decibel A levels (p < 0.001). Low-frequency noise on the decibel A scale was attenuated the most by the Drager isolette (p < 0.001), although the overall difference may be clinically insignificant. The Ohmeda isolette attenuated high-frequency noise by 28.4 dB as measured on the decibel A scale, which was greater than values for the Drager (22.8 dB) and Air Shields (14 dB) isolettes (p < 0.001).
CONCLUSIONS
High-frequency noise attenuation by the Ohmeda and Drager isolettes is clinically and statistically greater than high-frequency noise attenuation by the Air Shields isolette.