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本研究对匀速、加速及减速3种行驶状态磁悬浮列车噪声分别进行了双耳效应采样,并于实验室中测试被试对样本主观感受。结果表明,3种行驶状态列车噪声样本的主观烦恼度与LA均具有较好的关联度。比较加速段与减速段样本,前者的主观烦恼度要高于后者,且在等主观烦恼度水平下,前者比后者要低大约2.5~4.5dBA。对于3种行驶状态样本总体而言,主观烦恼度与LA10的相关系数最高(R=0.981),略高于主观烦恼度跟LA与LAmax的相关系数,建议采用LA10作为磁悬浮列车噪声排放限值的评价指标。
In this study, binaural sampling was performed on the magnetic levitation vehicle noise of three kinds of driving states of uniform, accelerating and decelerating respectively, and the participants were tested in the laboratory for the subjective experience of the samples. The results show that the subjective annoyances of the noise samples of the three driving states have a good correlation with LA. Comparing the acceleration and deceleration section samples, the former has more subjective annoyance and the latter is about 2.5-4.5 dBA lower than the latter at subjective levels of annoyance. For all three driving status samples, the correlation coefficient between subjective annoyance and LA10 is the highest (R = 0.981), which is slightly higher than the correlation coefficient between subjective annoyance and LA and LAmax. LA10 is recommended as the noise emission limit of maglev train Evaluation index.