Photoflash sources - Determination of guide numbers and output data
闪光光源.指南编号和输出数据的测定

2000-11-01

照相用电子闪光装置闪光指数的确定
Determination of flash guide numbers for electronic photoflash equipment

1992-12-19

Railway applications - Track - 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 applications
铁路应用.轨道.作用于空气声传播的噪声屏障和相关设备.声学性能测定的试验方法.第3-2部分:直接现场应用的标准化铁路噪声频谱和单次额定值；德文版EN 16272-3-2:2014

2014-10-01

Draft Document - 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 applications; German and English version prEN 16272-3-2:2022
文件草案——铁路应用——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3-2部分:直接现场应用的标准化铁路噪声频谱和单次额定值；德语和英语

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 3-1: Intrinsic characteristics - Normalized railway noise spectrum and single number ratings for diffuse sound field applications; German and English version prEN 16272-3-1:2022
文件草案.铁路应用.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3-1部分:固有特性.标准化铁路噪声频谱和漫反射声的单次额定值

2022-03-01