Noise zone of a strategic rail source noise map, of type A associated index LDEN of Ille-et-Vilaine

Noise level zones describe a noise exposure situation based on a noise indicator or area affected by noise. They are used primarily for the preparation of strategic noise maps pursuant to Article R.572-5 of the Environmental Code.噪声级区（Noise level zones）指基于噪声指标或受噪声影响区域，用以描述噪声暴露状况的划分单元。其主要应用场景为依据《环境法典》第R.572-5条编制战略性噪声地图。