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Frequency-Dependent Absorbing Boundary Implementations in 3D Finite Difference Time Domain Room Acoustics Simulations
conference contribution
posted on 2023-07-26, 13:57 authored by Stephen Oxnard, Dean O'Brien, Jelle van Mourik, Damian MurphyFinite Difference Time Domain room acoustics modelling provides accurate emulation of sound propagation within enclosed structures. Inclusion of frequency-dependent boundary conditions in such models facilitates emulation of realistic sound wave interaction with absorbing surface materials. These boundary conditions can be implemented by means of octave band modelling or digital impedance filter methods. This paper extends research in this area by comparing results obtained from these boundary modelling methods in terms of accuracy and required computational resources. Results show that octave band approaches achieve a higher degree of accuracy over the digital impedance filter method. However, in terms of simulation run times, the octave band model must make use of parallel computation architectures to realise a simulation time lower than the digital impedance filter model. Furthermore, the results presented inform routes of further study focussing on refinement of both methods to create an optimal, computationally efficient frequency-dependent boundary model.
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Page range
269-274ISSN
2226-5147Conference proceeding
Proceedings of the 10th European Congress and Exposition on Noise Control EngineeringName of event
10th European Congress and Exposition on Noise Control EngineeringLocation
Maastricht, NetherlandsEvent start date
2015-05-31Event finish date
2015-06-03Language
- other
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2016-10-13Legacy creation date
2016-10-07Legacy Faculty/School/Department
ARCHIVED Faculty of Science & Technology (until September 2018)Usage metrics
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