Methods for 2nd order spherical harmonic spatial encoding in Digital Waveguide Mesh virtual acoustic simulations

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Title of host publication2007 IEEE WORKSHOP ON APPLICATIONS OF SIGNAL PROCESSING TO AUDIO AND ACOUSTICS
DatePublished - 2007
Pages81-84
Number of pages4
PublisherIEEE
Place of PublicationNEW YORK
Original languageEnglish
ISBN (Print)978-1-4244-1618-9

Abstract

The Digital Waveguide Mesh (DWM) is a numerical simulation technique that has been shown to be suitable for modelling the acoustics of enclosed spaces. Previous work considered an approach using an array of spatially distributed receivers based on sound intensity probe theory to capture spatial room impulse responses (RIRs) from the DWM. A suitable process to facilitate spatial encoding of the DWM into second-order spherical harmonics has also been explored. The purpose of this paper is to introduce a new alternative processing scheme based on the Blumlein Difference Technique. Both the previous and currently presented techniques are newly formulated with the main processing in the frequency domain. In addition the ability of the newly proposed technique for capturing the 2(nd) order components is confirmed and further processing of the receiver array is considered to extend the usable frequency range.

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