The low frequency noise pollution issue is getting more and more attentions.As the low frequency noise can make people feel subjectively annoyed,the subjective evaluation method of low frequency noise based on equal annoyance degree has become the research hotspot.Therefore,the variation rule of human subjective feelings caused by low frequency noise was studied,and iso-annoyance contour of low frequency sound signal was obtained.Subjects were recruited to evaluate the subjective annoyance of 42 low-frequency acoustic signals with sound levels ranging from 45 to 75 dB and frequencies ranging from 100 to 315 Hz by Absolute Magnitude Estimation(AME).Dose-effect formulas for different frequencies were obtained through variance analysis and data fitting.After verification,the curves of equal annoyance degree in the low frequency range of 100-315 Hz were plotted.The results show that the low frequency acoustic annoyance meets the power exponential change law of dose-effect for sound pressure level.For frequency,acoustic signals with lower frequencies of the same sound level cause higher annoyance.The research results can provide ideas and references for the evaluation and control of low frequency noise.
关键词
声学/低频声/烦恼度/主观评价/绝对幅值评估/等烦恼度曲线
Key words
acoustics/low frequency sound/annoyance/subjective evaluation/absolute magnitude estimation/iso-annoyance contour
维普
万方数据