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

Alex Southern; Damian Murphy

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

Electronic Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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.

Original language	English
Title of host publication	2007 IEEE WORKSHOP ON APPLICATIONS OF SIGNAL PROCESSING TO AUDIO AND ACOUSTICS
Place of Publication	NEW YORK
Publisher	IEEE
Pages	81-84
Number of pages	4
ISBN (Print)	978-1-4244-1618-9
Publication status	Published - 2007
Event	IEEE Workshop on Applications of Signal Processing to Audio and Acoutics - New Paltz Duration: 21 Oct 2007 → 24 Oct 2007

Conference

Conference	IEEE Workshop on Applications of Signal Processing to Audio and Acoutics
City	New Paltz
Period	21/10/07 → 24/10/07

Cite this

@inproceedings{b881c0212a294fcea0f0d650ecb70671,

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

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.",

author = "Alex Southern and Damian Murphy",

year = "2007",

language = "English",

isbn = "978-1-4244-1618-9",

pages = "81--84",

booktitle = "2007 IEEE WORKSHOP ON APPLICATIONS OF SIGNAL PROCESSING TO AUDIO AND ACOUSTICS",

publisher = "IEEE",

address = "United States",

note = "IEEE Workshop on Applications of Signal Processing to Audio and Acoutics ; Conference date: 21-10-2007 Through 24-10-2007",

}

TY - GEN

T1 - Methods for 2nd order spherical harmonic spatial encoding in Digital Waveguide Mesh virtual acoustic simulations

AU - Southern, Alex

AU - Murphy, Damian

PY - 2007

Y1 - 2007

N2 - 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.

AB - 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.

M3 - Conference contribution

SN - 978-1-4244-1618-9

SP - 81

EP - 84

BT - 2007 IEEE WORKSHOP ON APPLICATIONS OF SIGNAL PROCESSING TO AUDIO AND ACOUSTICS

PB - IEEE

CY - NEW YORK

T2 - IEEE Workshop on Applications of Signal Processing to Audio and Acoutics

Y2 - 21 October 2007 through 24 October 2007

ER -