Description and validation of a combination of acoustical radiosity and the image source method

Gerd Høy Marbjerg, Cheol-Ho Jeong, Jonas Brunskog, Erling Nilsson

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


A model that combines image source modelling and acoustical radiosity with complex boundary con- ditions, thus including phase shifts on reflection, has been developed. The model is denoted Phased Acoustical Radiosity and Image Source Model (PARISM). It has been developed in order to be able to model both specular and diffuse reflections with complex-valued acoustical descriptions of the surfaces. This paper mainly describes the combination of the two models and the implementation of the angle dependent surface descriptions both in the image source model and in acoustical radiosity. It furthermore describes how a pressure impulse response is obtained from the energy based radios- ity model. Validation of the image source model with real-valued boundary conditions is done by comparison with the analytical Green’s function in an enclosure. The full model is compared with measurements done in a rectangular room with a highly absorbing ceilings
Original languageEnglish
Title of host publicationProceedings of Forum Acusticum
Number of pages9
Publication date2014
Publication statusPublished - 2014
Event7th Forum Acusticum - Krakow, Poland
Duration: 7 Sep 201412 Sep 2014


Conference7th Forum Acusticum


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