Road Noise - All Metrics - England Round 4

Data indicating the level of noise according to the strategic noise mapping of road sources across England.

- The day-evening-night level (Lden) is a noise indicator for overall annoyance based upon annual average A-weighted long-term sound over 24 hours with a 5 dB(A) penalty for evening noise (19:00-23:00) and a 10 dB(A) penalty for night-time noise (23:00-07:00).
- The 16-hour equivalent continuous level (LAeq,16h) is a noise indicator which describes the annual average steady noise level over the 16-hour daytime period (07:00 to 23:00) which contains the same sound energy as the actual fluctuating sound across the same period.
- The day level (Lday) is a daytime noise indicator based upon annual average A-weighted long-term sound over the daytime period (07:00-19:00) which contains the same sound energy as the actual fluctuating sound across the same period.
- The evening level (Leve) is an evening noise indicator based upon annual average A-weighted long-term sound over the evening period (19:00-23:00) which contains the same sound energy as the actual fluctuating sound across the same period.
- The night level (Lnight) is a night-time noise indicator based upon annual average A-weighted long-term sound over the night period (23:00-07:00) which contains the same sound energy as the actual fluctuating sound across the same period.

Noise levels are modelled on a 10m grid at a receptor height of 4m above ground, with a lower threshold cutoff of 35dB for the Lnight metrics, and 40dB for all other metrics. Data is available for all road traffic sources and also those defined as "major" under the Regulations.

This data is a product of the strategic noise mapping analysis undertaken in 2022 to meet the requirements of the Environmental Noise (England) Regulations 2006 (as amended). Attribution statement: © Department for Environment, Food & Rural Affairs copyright and/or database right 2023. All rights reserved.

本数据集揭示了英格兰境内道路噪声源的战略噪声映射水平。其中，日间夜间噪声级（Lden）系根据24小时内A计权长期平均声级，并对夜间噪声（19:00-23:00）施加5dB(A)的惩罚，对夜间噪声（23:00-07:00）施加10dB(A)的惩罚，从而成为整体扰民程度的噪声指标。
16小时等效连续声级（LAeq,16h）系描述日间16小时（07:00至23:00）内年度平均稳定噪声水平的噪声指标，其包含与同时间段实际波动噪声相等的声能量。
日间噪声级（Lday）系基于日间（07:00-19:00）年度平均A计权长期声级，其包含与同时间段实际波动噪声相等的声能量，为日间噪声指标。
夜间噪声级（Leve）系基于夜间（19:00-23:00）年度平均A计权长期声级，其包含与同时间段实际波动噪声相等的声能量，为夜间噪声指标。
夜间噪声级（Lnight）系基于夜间（23:00-07:00）年度平均A计权长期声级，其包含与同时间段实际波动噪声相等的声能量，为夜间噪声指标。
噪声水平以10米网格建模，在离地面4米处的接收器高度上，对于Lnight指标，下限截止值为35dB，对于所有其他指标，下限截止值为40dB。数据涵盖了所有道路交通源，以及根据法规定义的“重大”交通源。
该数据集为2022年进行的战略噪声映射分析成果，旨在满足2006年（经修订）的《环境噪声（英格兰）法规》的要求。归属声明：©环境、食品与农村事务部版权和/或数据库权利2023。版权所有。