机场噪声监测中的背景噪声影响及其监测方法研究

Research on the Influence of Background Noise and Its Monitoring Method in Aircraft Noise Monitoring

基于典型飞机噪声事件监测数据,采用声级叠加方法分析背景噪声对飞机噪声暴露声级LAE的影响。结果显示,为了保证测量数据的有效性,开展机场噪声监测时,背景噪声应低于单次飞机噪声事件最大声级15 dB以上。通过比选等效声级L_(eq)和累积百分声级L_(10)、L_(50)、L_(90)、L_(95)等常用噪声监测指标,证明采用与单次飞机噪声事件同期的5~10 min累积百分声级L_(50)作为背景噪声具有较好的代表性,并基于此提出了机场噪声监测中的背景噪声测量及处理方法。此方法科学、高效,适用于通过噪声监测设备自动获取背景噪声,对完善机场噪声监测方法具有较好的借鉴意义。

Based on the monitoring data of typical aircraft noise events,the sound level superposition method was uesd to analyze the influence of background noise on aircraft noise exposure level LAE monitoring.The results showed that in order to guarantee the validity of the measurement data,the background noise should be lower than the maximum sound level of 15 dB for a single aircraft noise event when carrying out airport noise monitoring.By comparing the equivalent sound level L_(eq) with the cumulative percentage sound level L_(10),L_(50),L_(90),L_(95) and other common noise monitoring indicators,it was proved that the background noise of the cumulative sound level L_(50) from 5-10 minutes at the same time as a single aircraft noise event was a good representative,and based on this,the method of background noise measurement and processing in airport noise monitoring was proposed.This method is scientific and efficient,and it is suitable for automatic acquisition of background noise through noise monitoring equipment.It has a good reference significance for improving airport noise monitoring methods.