Calculation and analysis of noise with a GIS-based solution.

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1 Calculation and analysis of noise with a GIS-based solution. making noise visible

2 Still measuring or already calculating? In the future, noise abatement will focus even more pronounced on measures at the source. To achieve this goal, innovative tools are necessary which are able to calculate, visualize and evaluate noise exposure accurately. Noise calculation has two clear advantages compared to noise measurements: It is more cost-effective because noise can be comprehensively calculated over large areas and secondly, it can simulate the introduction of different noise prevention measures. For example, it can be predicted how rail grinding reduces railway noise or how the construction of noise barriers diminishes the noise load of local residents. D-noise is based on the latest research results on the generation and propagation of noise, and allows an extraordinarily realistic and qualitatively superior depiction of different noise situations. Noise reduction measures can be simulated with D-noise. Quickly, simply and inexpensively.

3 D-noise is an Esri GIS based solution. Esri is the global market leader for geographic information systems. This provides the user with a wide range of functionality in order to process any kind of geo information. D-noise making noise visible

4 From raw data to noise reports. With one solution. Data processing Noise calculation Analysis Data import Standardization and processing of data Emission calculation Propagation calculation Immission calculation Analysis as a map Analysis in diagrams and reports Calculating noise exposure and developing suitable measures for noise reduction is, as a rule, a multi-level process. The most important working steps include data processing, noise calculation and evaluation of the results. D-noise is a comprehensive, complete solution that allows each of these steps to be carried out in a GIS environment. Data processing Noise calculation always needs spatial data (roads, railways, buildings, terrain model, etc.) and traffic data. This information usually originates from different sources and is accordingly heterogeneous and often insufficiently processed. D-noise makes it possible to load all required information in a pre-structured database and standardizes and processes it to meet the requirements of the selected noise calculation model. Noise calculation D-noise allows the noise calculation in three separate steps for emission, propagation and immission. Each of these processes is mapped on its own model: The emission model describes the generation and radiation of the sound such as for road or railway traffic. In the propagation model, the various sound attenuation effects are taken into account such as atmospheric absorption, barrier attenuation and ground effect, meteorological influences, and the reflection of sound. The immission calculation model delivers the resulting immission concentrations at the receiver. Resulting sound exposure levels can not only be presented as noise maps, but also as free-field receiver positions or façade points. The latter is used for the assessment of houses, which can be automatically calculated with different calculation points per façade and floor. The reporting for the assessment of houses can then be based on the highest level per building only or a more subtle algorithm combining results from individual façade points. Thanks to the modular assembly, an immission calculation with different emission values can be conducted without repetition of the complex propagation calculation. So, in practice, various traffic scenarios can be provided quickly, simply and inexpensively, and different measures can be subsequently tested. Analysis An individually configurable reporting tool is available to answer an extensive list of questions. So, for example, the results can be directly combined with sociodemographic data, which allows quick and simple identification of persons affected by noise. D-noise offers different ways to present your results noise burden maps, Excel diagrams up to complete noise reports as Word files with text, maps and diagrams.

5 Superior noise monitoring. No matter with which model. D-noise includes a set of sophisticated models that are based on state-of-the-art research. But at the same time, various traditional noise calculation programs are available as well with the D-noise solution. The data from large-scale noise analysis can be processed, stored and visualized with D-noise. The modular system makes it possible to connect almost any noise calculation program via standard interfaces. In order to provide a high-precision physical mapping of a noise situation for railway and road it is recommended to use the calculation models sonrail* and sonroad*. D-noise facilitates large-scale calculations. Efficiently, precisely and in high resolution. D-noise offers: D-noise offers clearly separated processes. This makes the solution modular, independent and scalable. Because damping data is held within the system, comprehensive comparisons of scenarios are possible. Quickly, simply and inexpensively. All data such as different temporal states, traffic scenarios and proposed mitigation measures is held and administered. As a true complete solution, D-noise contains all elements from the data processing and homogenization through to the actual calculation up to the 3D visualization and automated analysis. For calculation of railway noise: sonrail The emission model yields one-third-octave band sound power levels for five predefined source heights along the vehicle surface, depending up the vehicle and track type, the travelling speed and the rail roughness. The propagation calculation includes a sophisticated reflection model and considers specific meteorological situations. Therefore, very precise and detailed noise calculations are possible with this model. For calculation of road noise: sonroad Engine and rolling noise components for passenger cars and trucks are described separately depending on speed, road inclination, surface type and traffic volume. The propagation model of sonroad considers important factors such as air absorption, ground effects, barriers, reflection and also meteorological influences. For the propagation calculation not the original, but an adaption of the more sophisticated sonrail model is used Documentation of developments: Different situations can be compared and compiled as a time series. * sonrail and sonroad noise calculation models were developed by Empa, the Swiss Federal Laboratories for Materials Testing and Research, under the patronage of the Federal Office for Environment (FOEN) of Switzerland. The sonrail emission model was designed by TU Berlin.

6 A better way to get precise results. That is D-noise. D-noise is a GIS-based software solution for the calculation and analysis of the sound exposure from road and railway traffic and for the planning of effective remedial measures. Thereby, the system sets entirely new standards: High quality and accuracy of noise calculations n-sphere your GIS specialist in the environmental area. With many years of experience in the GIS area, n-sphere is your strong partner. We understand the needs and demands and focus on added value for our customers. Good project management is a major issue for us. We therefore focus on cost control and project deadline as much as on delivering content to the full satisfaction of our customers. Simulation and comparison of different remedial measures Statistical analysis of local and large scale noise exposure Yours sincerely Your n-sphere Team Various options for cartographical visualization of a noise situation Practice-proven and validated n-sphere T Räffelstrasse 29 info@n-sphere.ch CH-8045 Zurich