Room Impulse Response Synthesis Based on a 2D Multi-plane FDTD Hybrid Acoustic Model

Stephen Oxnard; Damian Thomas Murphy

doi:10.1109/WASPAA.2013.6701887

Room Impulse Response Synthesis Based on a 2D Multi-plane FDTD Hybrid Acoustic Model

Stephen Oxnard, Damian Thomas Murphy

Electronic Engineering

Research output: Contribution to conference › Paper › peer-review

Abstract

This paper exposes, and analyzes the validity of, a novel hybrid acoustic modeling system created through complementary assimilation of 3D geometric and 2D numerical modeling techniques. It is demonstrated that multiple 2D Finite Difference Time Domain schemes may be employed to simulate low-frequency sound wave propagation throughout a simplistic 3D enclosure, thus avoiding the immense computational challenges posed by 3D numerical approaches. Band limited room impulse responses (RIRs) generated in this way may be appropriately calibrated and combined with high-frequency results obtained from well-established geometric modeling methods to realize efficient, yet accurate hybrid RIR synthesis. Objective results show that the low-frequency 2D multiplane solution yields comparable accuracy to that gained through 3D simulation while achieving a run-time reduction of 99.15%.

Original language	English
Pages	1-4
Number of pages	4
DOIs	https://doi.org/10.1109/WASPAA.2013.6701887
Publication status	Published - 20 Oct 2013
Event	2013 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA), - New York, New Paltz, United States Duration: 20 Oct 2013 → 23 Oct 2013

Conference

Conference	2013 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA),
Country/Territory	United States
City	New Paltz
Period	20/10/13 → 23/10/13

Access to Document

10.1109/WASPAA.2013.6701887

http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6701887&tag=1

Cite this

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title = "Room Impulse Response Synthesis Based on a 2D Multi-plane FDTD Hybrid Acoustic Model",

abstract = "This paper exposes, and analyzes the validity of, a novel hybrid acoustic modeling system created through complementary assimilation of 3D geometric and 2D numerical modeling techniques. It is demonstrated that multiple 2D Finite Difference Time Domain schemes may be employed to simulate low-frequency sound wave propagation throughout a simplistic 3D enclosure, thus avoiding the immense computational challenges posed by 3D numerical approaches. Band limited room impulse responses (RIRs) generated in this way may be appropriately calibrated and combined with high-frequency results obtained from well-established geometric modeling methods to realize efficient, yet accurate hybrid RIR synthesis. Objective results show that the low-frequency 2D multiplane solution yields comparable accuracy to that gained through 3D simulation while achieving a run-time reduction of 99.15%.",

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doi = "10.1109/WASPAA.2013.6701887",

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AU - Murphy, Damian Thomas

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N2 - This paper exposes, and analyzes the validity of, a novel hybrid acoustic modeling system created through complementary assimilation of 3D geometric and 2D numerical modeling techniques. It is demonstrated that multiple 2D Finite Difference Time Domain schemes may be employed to simulate low-frequency sound wave propagation throughout a simplistic 3D enclosure, thus avoiding the immense computational challenges posed by 3D numerical approaches. Band limited room impulse responses (RIRs) generated in this way may be appropriately calibrated and combined with high-frequency results obtained from well-established geometric modeling methods to realize efficient, yet accurate hybrid RIR synthesis. Objective results show that the low-frequency 2D multiplane solution yields comparable accuracy to that gained through 3D simulation while achieving a run-time reduction of 99.15%.

AB - This paper exposes, and analyzes the validity of, a novel hybrid acoustic modeling system created through complementary assimilation of 3D geometric and 2D numerical modeling techniques. It is demonstrated that multiple 2D Finite Difference Time Domain schemes may be employed to simulate low-frequency sound wave propagation throughout a simplistic 3D enclosure, thus avoiding the immense computational challenges posed by 3D numerical approaches. Band limited room impulse responses (RIRs) generated in this way may be appropriately calibrated and combined with high-frequency results obtained from well-established geometric modeling methods to realize efficient, yet accurate hybrid RIR synthesis. Objective results show that the low-frequency 2D multiplane solution yields comparable accuracy to that gained through 3D simulation while achieving a run-time reduction of 99.15%.

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