Railway applications. Infrastructure. Under ballast mats
铁路应用 基础设施压载垫下

2020-10-13

Draft Document - Railway applications - Infrastructure - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance - Part 5: Intrinsic characteristics - Sound absorption under direct sound field conditions; German and English version prEN 16272-5:2022
文件草案——铁路应用——基础设施——作用于空气声传播的隔音屏障和相关装置——声学性能测定的试验方法——第5部分:固有特性——直接声场条件下的吸声；德语和英语版本

2022-03-01

Draft Document - Railway applications - Infrastructure - Noise barriers and related devices acting on airborne sound propagation - Test method for determining the acoustic performance - Part 6: Intrinsic characteristics - In-situ-values of airborne sound insulation under direct sound field conditions; German and English version prEN 16272-6:2022
文件草案.铁路设施.基础设施.作用于空气声传播的噪声屏障和相关装置.声学性能测定的试验方法.第6部分:固有特性.直接声场条件下空气声隔声的现场值

2022-03-01