变电站站界噪声抗干扰测量方法

Anti-interference Measurement Method of Substation Boundary Noise

变电站站界噪声的准确测量是对其进行声环境影响评价、噪声治理的重要前提。当前采用声级计进行测量的方法,在有干扰噪声影响时受影响较大,容易导致测试效率低、结果不可靠。因此提出一种变电站站界噪声抗干扰测量方法,基于双传声器形成测量指向性测量,通过指向性测量的结果计算每个时频点干扰噪声的存在概率,并根据存在概率计算噪声,从而降低干扰噪声的影响,得到更为准确的变电站站界噪声结果。在消声室内搭建了实验系统,通过实验验证了方法的有效性。该方法对于变电站站界噪声抗干扰监测具有重要促进作用,应用前景广泛。

Accurate measurement of substation boundary noise is an important prerequisite for sound environmental impact assessment and noise control.At present,the measurement method of sound level meter is greatly affected when noise interference is encountered,which easily leads to low test efficiency and unreliable results.This paper proposes a substation boundary noise anti-interference measurement method,based on double microphone directivity measurement,which calculating the probability of the existence of the noise in each frequency spectrum by the results of directivity measurement,and then reducing sudden noise according to the probability.An experimental system has been set up in an anechoic chamber,and the effectiveness of the method has been verified by experiments.This method plays an important role in promoting anti-interference monitoring of substation boundary noise and has great application prospect.