A Parameter Study on the Ray Space Transform Method and its Performance Compared to the Spatial Decomposition Method

Jensen, Simon Boelt ; Chavez Morales, Gustavo Esteban

4. term

Acoustics and Audio Technology, Master

2017

2017-06-07

102 pages

Room acoustics analysis and synthesis using the Spatial Decomposition(SDM) method has become widely known and is used in applications such as room impulse visualization and auralization. The Ray-Space Transform Method(RSTM) is a new framework to perform analysis and synthesis of a room, and, due to the novelty of the method many characteristics have not been studied in depth. The purpose of this thesis is to study the RSTM framework and its paramters, and then determine its advantages and disadvantages and compare it with the SDM method for acoustical room analysis, by comparing the performance on sound source estimation. The thesis defines the significant parameters of the RSTM and their impact on estimation of sound sources. The comparison of the methods is done on parameters which are common for each method. The comparison finds that in many aspects the methods perform similarly, with some exceptions. Following the comparison study, some tests on real data is performed on the RSTM, to verify the simulations presented in earlier chapters. Tests are done for a non-anechoic environment using a low amount of microphones, an anechoic chamber using the same settings as for the simulations, and for a standard listening room. The tests on real measurements show that the RSTM performs as the simulations predicted.

Ray Space Transform Method ; Sound field imaging ; Sound field analysis ; Source localization

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