Acoustical modelling of industrial facilities-outdoor plant noise control design and construction

摘要

With the noise prediction software CadnaA it is possible to model industrial plants with all relevant sources, to walk around in a 3-D-model of the plant and to modify objects without leaving this virtual space. When modelling an existing plant, it is advantageous to measure the noise emission of the sources. Some corrections not described in the standards ISO 3744/46 are necessary to take into account the angle error, when sound power levels are deduced from sound pressure measurements. These corrections are discussed and quantified for some source types.