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Chapter 6 - Modeling Industrial Sources

Sound propagation for industrial sites and commercial areas as well as for all other noise relevant facilities that have stationary (fixed) noise sources or discrete moving sources is modeled based on the concept of point-, line- and area-sources the emission of which is specified by the sound power level.

Point, line, and area sources on the CadnaA-toolbox

In this chapter the following tasks often encountered in industrial noise modeling are described:

  • building radiation (by facades, facade parts, or by an entire building),
  • internal traffic lanes (e.g. inside industrial plants, traffic in pits, or on race tracks) or traffic areas (e.g. areas with fork-lifters, loading/unloading of goods, harbor areas),
  • directivity of sound sources (predefined or user-defined directivities),
  • modeling of the directivity at chimneys and stacks (as a special case),
  • areas with defined ground absorption characteristics, and
  • consideration of meteorology (wind influence).

In all cases the international standard, ISO 9613-2 (1996), is applied to model the propagation (see dialog Configuration, tab Standards).