北京市公交车站噪声环境特性

为研究北京市公交站台噪声谱特性，对北京公交67路14个站台声学特性进行测量分析。结果显示，对象公交站台等效声级L Aeq处于较高水平，均值达76.5 dB(A)，峰值与本底分别为78.5 dB(A)和67.1 dB(A)。频谱分析结果显示，站台噪声具有明显的低频特征；进一步分析存在若干较强的基频成分：低频段约在31.5 Hz与80 Hz附近，高频段则以8 kHz为代表。

Study on Characteristics of Noise Environment at Bus Stops in Beijing

For investigation of noise environment at bus stops in Beijing measurement and analysis of noise data at 14 bus stops of bus No.67 were taken. The results show rather high level LAoq with 76.5 dB（A） in average, 78.5 dB（A） peak. The background noise level was 67.1 dB（A）. It is found by spectrum analyses that low frequency components are predominant in this kind of noise environment with some apparent tones at 31.5 Hz and 80 Hz. The peak around 8kHz in high frequency appears representatively.