Measurement setup design for scattering patterns based on numerical simulations (de)
* Presenting author
The acoustic scattering of surfaces is crucial for acoustic simulations in rooms or urban spaces. The sound propagation is usually calculated by using geometrical simulation methods and random-incidence scattering coefficients. In a running project, new approaches towards angle-dependent scattering metrics are defined and investigated. With this, a rapid reliable measurement setup for directional information of scattering surfaces such as for sound steering is aimed for. In this paper, Boundary Element Method (BEM) simulations of scattering patterns are used to design a rapid measurement setup based on loudspeaker and microphone arrays for measuring the scattering pattern under different incidence angles. Therefore, the random-incidence scattering coefficient is calculated based on the measured scattering patterns of a sine-shape surface and validated with measurement results, based on ISO 17497-1, on analytical calculations and on BEM simulations.