A new approach for real-time sound insulation filters development

摘要

Auralization of sound insulation has become a valuable tool to assess the perceptual aspects of sound transmission in built environments. One advanced goal is to appropriately describe the influence of noise disturbance on human cognitive performance in the built environment. Methods for auralization of sound insulation are available with several simplifications that are implicit in the formulation of ISO 12354. There, the transfer functions from source to receiver room are only valid for diffuse-field assumptions, i.e. for arbitrary point to point transmission. One further simplification is that the sound is apparently radiated from one point representing the whole bending wave pattern on the wall. In this paper, we introduce a new technique for computing sound insulation Filters for virtual acoustic scenes in buildings with respect to more complex sound propagation effects. At first, we consider the source room reverberation and the source directivity. Secondly, the transfer functions from source to receiver rooms are calculated for extended walls by using a distribution of secondary sound sources. The receiving room acoustics is implemented in a way that it encompasses the reverberation based on room geometry, absorption and binaural transfer functions between the radiating walls and the receiver.