Boundary Absorption Approximation in the Spatial High-Frequency Extrapolation Method for Parametric Room Impulse Response Synthesis

Alex Southern; Damian Thomas Murphy; Lauri Savioja

doi:10.1121/1.5096162

Boundary Absorption Approximation in the Spatial High-Frequency Extrapolation Method for Parametric Room Impulse Response Synthesis

Alex Southern, Damian Thomas Murphy, Lauri Savioja

Research output: Contribution to journal › Special issue › peer-review

Abstract

The Spatial High-frequency Extrapolation Method (SHEM) extrapolates low-frequency band-limited spatial room impulse responses (SRIRs) to higher frequencies based on a frame-by-frame time/frequency analysis that determines directional reflected components within the SRIR. Such extrapolation can be used to extend finite- difference time domain (FDTD) wave propagation simulations, limited to only relatively low frequencies, to the full audio band. For this bandwidth extrapolation, a boundary absorption weighting function is proposed based on a parametric approximation of the energy decay relief of the SRIR used as the input to the algorithm. Results using examples of both measured and FDTD simulated impulse responses demonstrate that this approach can be applied successfully to a range of acoustic spaces. Objective measures show a close approximation to reverberation time, and acceptable early decay time values. Results are verified through accompanying auralizations that demonstrate the plausibility of this approach when compared to the original reference case.

Original language	English
Pages (from-to)	2770-2782
Number of pages	13
Journal	The Journal of the Acoustical Society of America
Volume	145
Issue number	4
Early online date	30 Apr 2019
DOIs	https://doi.org/10.1121/1.5096162
Publication status	E-pub ahead of print - 30 Apr 2019

Bibliographical note

Keywords

acoustics
Auralization
Room Acoustics
Impulse Responses

Access to Document

10.1121/1.5096162Licence: CC BY

Boundary absorption approximation in the spatial high-frequency extrapolation method for parametric room impulse response synthesis
© Author(s) 2019
Final published version, 4.26 MBLicence: CC BY

Damian Thomas Murphy
- damian.murphyyork.acuk
- Electronic Engineering - Professor
Person: Academic

1 Invited talk
1 Academic

Sound Design in Our Sound Environment: Soundscape Design, Auralisation and Evaluation in Environmental Acoustics
Damian Thomas Murphy (Chair)
27 Feb 2018
Activity: Talk or presentation › Invited talk
Aalto University
Damian Thomas Murphy (Researcher)
20 Apr 2015 → 24 Jul 2015
Activity: Visiting an external institution › Academic

The Digital Creativity Hub
Cowling, P. I. (Principal investigator), Austin, J. (Co-investigator), Cairns, P. A. (Co-investigator), Holliman, N. S. (Co-investigator), Hook, J. D. (Co-investigator), Marsden, E. (Co-investigator), Murphy, D. T. (Co-investigator), Petrie, H. (Co-investigator), Reed, D. J. (Co-investigator), Richards, J. D. (Co-investigator), Ursu, M. (Co-investigator), Wade, A. (Co-investigator), Baier, H. (Researcher), Beale, G. (Researcher), Block, F. O. (Researcher), Deterding, C. S. (Researcher), Devlin, S. (Researcher), Drachen, A. (Researcher), Kasprowicz, R. E. (Researcher), Smith, D. P. (Researcher) & Williams, D. A. H. (Researcher)
EPSRC
1/10/15 → 30/09/22
Project: Research project (funded) › Research
AECOM Industry Fellowship
Murphy, D. T.
THE ROYAL SOCIETY
1/01/14 → 31/08/14
Project: Research project (funded) › Research
From OpenAIR to the Open Air: The application of Virtual Acoustic Techniques in Landscapes and Novel Environments for Computer Games
Murphy, D. T.
AHRC
1/09/12 → 29/11/13
Project: Research project (funded) › Research

OpenAirLib
Brown, K. I. (Creator) & Murphy, D. T. (Creator), University of York, 12 Jan 2017
DOI: 10.15124/d0483441-24cb-4f34-9e48-8e651781cad3, https://github.com/UoYWEAVER/OpenAirLib and one more link, https://www.apache.org/licenses/LICENSE-2.0 (show fewer)
Dataset
OpenAIR - The Open Acoustic Impulse Response Library
Murphy, D. T. (Creator), OpenAIR website, 1 Sept 2010
http://www.openairlib.net/
Dataset

Cite this

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title = "Boundary Absorption Approximation in the Spatial High-Frequency Extrapolation Method for Parametric Room Impulse Response Synthesis",

abstract = "The Spatial High-frequency Extrapolation Method (SHEM) extrapolates low-frequency band-limited spatial room impulse responses (SRIRs) to higher frequencies based on a frame-by-frame time/frequency analysis that determines directional reflected components within the SRIR. Such extrapolation can be used to extend finite- difference time domain (FDTD) wave propagation simulations, limited to only relatively low frequencies, to the full audio band. For this bandwidth extrapolation, a boundary absorption weighting function is proposed based on a parametric approximation of the energy decay relief of the SRIR used as the input to the algorithm. Results using examples of both measured and FDTD simulated impulse responses demonstrate that this approach can be applied successfully to a range of acoustic spaces. Objective measures show a close approximation to reverberation time, and acceptable early decay time values. Results are verified through accompanying auralizations that demonstrate the plausibility of this approach when compared to the original reference case.",

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N2 - The Spatial High-frequency Extrapolation Method (SHEM) extrapolates low-frequency band-limited spatial room impulse responses (SRIRs) to higher frequencies based on a frame-by-frame time/frequency analysis that determines directional reflected components within the SRIR. Such extrapolation can be used to extend finite- difference time domain (FDTD) wave propagation simulations, limited to only relatively low frequencies, to the full audio band. For this bandwidth extrapolation, a boundary absorption weighting function is proposed based on a parametric approximation of the energy decay relief of the SRIR used as the input to the algorithm. Results using examples of both measured and FDTD simulated impulse responses demonstrate that this approach can be applied successfully to a range of acoustic spaces. Objective measures show a close approximation to reverberation time, and acceptable early decay time values. Results are verified through accompanying auralizations that demonstrate the plausibility of this approach when compared to the original reference case.

AB - The Spatial High-frequency Extrapolation Method (SHEM) extrapolates low-frequency band-limited spatial room impulse responses (SRIRs) to higher frequencies based on a frame-by-frame time/frequency analysis that determines directional reflected components within the SRIR. Such extrapolation can be used to extend finite- difference time domain (FDTD) wave propagation simulations, limited to only relatively low frequencies, to the full audio band. For this bandwidth extrapolation, a boundary absorption weighting function is proposed based on a parametric approximation of the energy decay relief of the SRIR used as the input to the algorithm. Results using examples of both measured and FDTD simulated impulse responses demonstrate that this approach can be applied successfully to a range of acoustic spaces. Objective measures show a close approximation to reverberation time, and acceptable early decay time values. Results are verified through accompanying auralizations that demonstrate the plausibility of this approach when compared to the original reference case.

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KW - Auralization

KW - Room Acoustics

KW - Impulse Responses

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Boundary Absorption Approximation in the Spatial High-Frequency Extrapolation Method for Parametric Room Impulse Response Synthesis

Abstract

Bibliographical note

Keywords

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