Pawlaczyk-Luszczynska Malgorzata, Dudarewicz Adam, Szymczak Wieslaw, Sliwinska-Kowalska Mariola
Department of Physical Hazards, Nofer Institute of Occupational Medicine, Lodz, Poland.
Noise Health. 2010 Jul-Sep;12(48):166-81. doi: 10.4103/1463-1741.64974.
The aim of the study was to investigate the annoyance of low frequency noise (LFN) at levels normally prevailing at workplaces in control rooms and office-like areas. Two different laboratory experiments were carried out. The first experiment included 55 young volunteers and the second one comprised 70 older volunteers, categorized in terms of sensitivity to noise. The subjects listened to noise samples with different spectra, including LFNs at sound pressure level (SPL) of 45-67 dBA, and evaluated annoyance using a 100-score graphical rating scale. The subjective ratings of annoyance were compared to different noise metrics. In both the experiments, there were no differences in annoyance assessments between females and males. A significant influence of individual sensitivity to noise on annoyance rating was observed for some LFNs. Annoyance of LFN was not rated higher than annoyance from broadband noises without or with less prominent low frequencies at similar A-weighted SPLs. In both the experiments, median annoyance rating of LFN highly correlated with A-weighted SPL (L(Aeq,T)), low frequency A-weighted SPL (L(LFAeq,T)) and C-weighted SPL (L(Ceq,T)). However, it is only the two latter noise metrics (i.e. L(LFAeq,T) and L(Ceq,T)) which seem to be reliable predictors of annoyance exclusively from LFN. The young and older participants assessed similar annoyance from LFN at similar L(LFAeq,T) or L(Ceq,T) levels. Generally, over half of the subjects were predicted to be highly annoyed by LFN at the low frequency A-weighted SPL or C-weighted SPL above 62 and 83 dB, respectively.
本研究的目的是调查在控制室和类似办公室区域的工作场所中通常存在的低频噪声（LFN）的烦扰程度。进行了两项不同的实验室实验。第一个实验包括55名年轻志愿者，第二个实验包括70名老年志愿者，根据对噪声的敏感性进行分类。受试者听取了具有不同频谱的噪声样本，包括声压级（SPL）为45 - 67 dBA的低频噪声，并使用100分图形评分量表评估烦扰程度。将烦扰的主观评分与不同的噪声指标进行比较。在两项实验中，女性和男性在烦扰评估方面均无差异。对于某些低频噪声，观察到个体对噪声的敏感性对烦扰评分有显著影响。在相似的A加权声压级下，低频噪声的烦扰程度并未高于无低频或低频不突出的宽带噪声的烦扰程度。在两项实验中，低频噪声的烦扰评分中位数与A加权声压级（L(Aeq,T)）、低频A加权声压级（L(LFAeq,T)）和C加权声压级（L(Ceq,T)）高度相关。然而，似乎只有后两个噪声指标（即L(LFAeq,T)和L(Ceq,T)）是仅由低频噪声引起的烦扰的可靠预测指标。年轻和老年参与者在相似的L(LFAeq,T)或L(Ceq,T)水平下对低频噪声的烦扰评估相似。一般来说，预计分别有超过一半的受试者在低频A加权声压级或C加权声压级高于62 dB和83 dB时会受到低频噪声的高度烦扰。
