Simple download service (Atom) of the data package: Lot comprising all data sets of noise zones (A,B and C) in Héault

Aggregation of generic tables describing the Noise Zones, for all terrestrial infrastructure, map type A, B and C. ‘Type A’ exposure maps Lden and Ln index: These maps were made pursuant to Article 3-II-1°-a of the Decree of 24 March 2006. These are cards representing for the year of establishment: — areas exposed to more than 55 dB(A) in Lden — areas exposed to more than 50 dB(A) in Ln They are in the form of isophone curves of 5 in 5 dB(A). Map of areas affected by noise or “type B” maps: These maps were made pursuant to Article 3-II-1°-b of the Decree of 24 March 2006. This is a map representing the “noise affected sectors” defined in the Prefectural Sound Classification Orders. Limit values exceedance maps or ‘type C’ index Lden and Ln charts: These maps were made pursuant to Article 3-II-1°-c of the Decree of 24 March 2006. These are maps representing areas where noise limit values are exceeded for residential, educational and health buildings. The limit values are 68 dB(A) in Lden and 62 db(A) in Ln. Lden: sound level indicator means Level Day-Evening-Night. It corresponds to an equivalent 24-hour sound level in which evening and night noise levels are increased by 5 and 10 dB(A), respectively, to reflect greater discomfort during these periods. LN: noise level indicator for the night period (22h-6h).涵盖所有陆地基础设施的A、B、C三类噪声分区通用数据表汇总。 A类暴露地图（含Lden与Ln噪声指数）： 本类地图依据2006年3月24日政令第3-II-1°-a条编制，用于展示基准年的两类受噪区域： —— Lden指数超过55 dB(A)的区域； —— Ln指数超过50 dB(A)的区域。 其采用每5 dB(A)为间隔的等声级线（isophone curves）形式绘制。 噪声影响区域地图（即B类地图）： 本类地图依据2006年3月24日政令第3-II-1°-b条编制，用于展示《省级噪声分级政令》中定义的“噪声影响片区”。 噪声限值超标区域地图（即C类Lden与Ln指数地图）： 本类地图依据2006年3月24日政令第3-II-1°-c条编制，用于展示住宅、教育及医疗建筑所在区域的噪声限值超标情况。其中Lden指数限值为68 dB(A)，Ln指数限值为62 dB(A)。 术语说明： 1. Lden（全称Level Day-Evening-Night，即昼夜等效声级）：指将傍晚与夜间时段的噪声级分别加权5 dB(A)与10 dB(A)后的24小时等效声级，用以体现该时段噪声带来的更强不适感。 2. Ln：夜间时段（22时至次日6时）噪声级指数。