美利体育登录入口官网:DIN EN 16272-3-2/A1:2024-09
铁路应用 基础设施 用于空气传播噪声的隔音屏障及相关装置 确定声学性能的测试方法 第3-2部分:标准化铁路噪声频谱及直接声源的单数值评价
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 so...