Environmental acoustics

Environmental noise is today affecting everyone and is therefore one of the most important challenges to public health. Noise from roads and railroads, fly-over aircraft, industries and construction sites lead to increased stress and poor sleep. It is told that one single motorbike crossing Paris a warm summer night, wakes up about 250 000 people. Long exposure to high noise levels may also cause hearing damage as well as tinnitus.

To take cost effective and efficient mitigation action a reliable prediction model is extremely useful. The model is used to calculate the sound exposure were people are disturbed, first at the present situation and second, after noise reduction measures are taken. A validated model is a powerful tool to assess various measures, like sound barriers and limitations in vehicle speed to arrive at the most cost effective solution. For airports, effects of altered landing and take off patterns can be assessed.

Together with our partner Akustix Poland we can offer simulation of environmental sound using SoundPLAN for road and rail noise, commercial and leisure noise, aircraft noise, as well as sound propagation indoors. Akustix has a long and proven experience using SoundPlan, also for airport noise modelling, see below..

The starting point is 3-d GIS maps (via georeferenced bitmaps or data from DXF, ASCII and QSI) and relevant source models. Calculations can be made according to the Nordic Prediction models Nord2000Road (report 4653) and Nord2000Rail (report 4935). Airport noise calculations are typically made using SS ISO 9613 or Cnossos EU.

Noise map of Poznań representing the percentage of highly annoyed (a) and highly sleep disturbed (b) people (from: A. Peis et al. "Vibrations in Physical Systems", November 2019)