铝合金地铁车内噪声测试及其响度分析

摘要

地铁车辆车内噪声直接影响旅客乘坐舒适性。掌握车内噪声特性，可以为地铁车辆车体结构声学设计及车内声学环境优化提供理论参考。依据标准测试不同运行速度下铝合金地铁车辆车内噪声，获得车内噪声频谱特性。根据能够反映主观听觉作用的心理声学理论，进行车内噪声特性响度分析，比较声压和响度评价车内噪声的差异，并在此基础上提出车内降噪的频率范围。%Metro vehicle interior noise affects the comfort of passengers directly.Mastering the interior noise characteristics can give theoretical reference to car body structure acoustic design and interior acoustic environ-ment optimization for metro vehicles.In reference of the national standards,the interior noise of the aluminum al-loy metro vehicle were tested at different speed to gain the interior noise spectrum characteristics.According to psychoacoustical theories which can reflect the subjective audition and loudness characteristics of interior noise of the tested metro vehicle.And the difference of assessing the interior noise between the sound level and the loud-ness level were compared.The suitable frequency range of noise reduction was suggested.