DIN EN 16272-3-2:2022 铁路应用 基础设施 噪声屏障和作用于空气声传播的相关设备 确定声学性能的测试方法 第 3-2 部分:归一化铁路噪声频谱和直接场的单数评级
Railway applications - Infrastructure - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance - Part 3-2: Normalized railway noise spectrum and single number ratings for direct field