Noise map

With noise maps Schallimmissionspegel be displayed on a color scale on maps or site plans. They are used for noise abatement as a basis for urban planning, to determine the noise dose for occupational safety and to visualize the noise levels during the construction of new buildings or transport facilities.

Application

The according to the law for the protection to be determined against aircraft noise protection zones based on noise maps. As with noise maps, the level distribution is visualized from a sound source to the receiving point, this will also help control for noise, or noise calculations for singular sound receiving points. Noise maps acquired a central role in the implementation of the provisions adopted by the European Parliament and the Council Directive 2002/49/EC on the assessment and management of environmental noise ( " EU Environmental Noise Directive"). These noise maps are created in a five -year cycle. The first mapping session started in 2007. Vertical noise maps ( sectional or profile noise maps ) serve to illustrate the noise distribution in ground sections, for example, to monitor success in the construction of noise barriers. With differential noise maps before-and- after comparisons are visualized.

Technology

The Schallimmissionspegel today are largely determined by calculation with special noise prediction software. Noise maps obtained when sound receiving points are distributed areally in an examination room, so that subsequently iso- dB (A ) lines and surfaces of equal dB ( A) intervals can be formed. Most often, the points are arranged in a grid -like for the ambient air concentration, for example, with a grid spacing of 10 m. A generation of noise maps of the spatial meshing arbitrarily distributed points is also possible. Noise maps for major cities or metropolitan areas are very computationally intensive. The calculations are usually carried out with computer networks ( Distributed Computing ).

Evaluation of noise maps

The results can be statistically evaluated further or rescale to persons affected. A very graphic depiction of areas of conflict are obtained if one represents the spatial distribution of people affected by noise as " noise hotspots ".