Enhanced Acoustic Modelling for Auralisation using Hybrid Boundary Integral Methods

A framework for auralization of boundary element method simulations including source and receiver directivity (2019)
Journal Article

The Boundary Element Method (BEM) is a proven numerical prediction tool for computation of room acoustic transfer functions, as are required for auralization of a virtual space. In this paper it is validated against case studies drawn from the ‘Groun... Read More about A framework for auralization of boundary element method simulations including source and receiver directivity.

The wave-matching boundary integral equation - an energy approach to Galerkin BEM for acoustic wave propagation problems (2018)
Journal Article
Hargreaves, J., & Lam, Y. (2019). The wave-matching boundary integral equation - an energy approach to Galerkin BEM for acoustic wave propagation problems. Wave Motion, 87, 4-36. https://doi.org/10.1016/j.wavemoti.2018.07.003

In this paper, a new Boundary Integral Equation (BIE) is proposed for solution of the scalar Helmholtz equation. Applications include acoustic scattering problems, as occur in room acoustics and outdoor and underwater sound propagation. It draws toge... Read More about The wave-matching boundary integral equation - an energy approach to Galerkin BEM for acoustic wave propagation problems.

A transformation approach for efficient evaluation of oscillatory surface integrals arising in three-dimensional boundary element methods (2016)
Journal Article

We propose a method for efficient evaluation of surface integrals arising in boundary element
methods for three-dimensional Helmholtz problems (with real positive wavenumber k), modelling
wave scattering and/or radiation in homogeneous media. To re... Read More about A transformation approach for efficient evaluation of oscillatory surface integrals arising in three-dimensional boundary element methods.

Workshop on numerical acoustic simulation and auralisation as built environment design consultation tools (2015)
Journal Article

Extended version of an article appearing in the November 2015 issue of Acoustics Bulletin, the UK Institute of Acoustics magazine. Describes an EPSRC-funded workshop, which was co-hosted by Arup and the University of Salford.

For more informatio... Read More about Workshop on numerical acoustic simulation and auralisation as built environment design consultation tools.

An energy interpretation of the Kirchhoff-Helmholtz boundary integral equation and its application to Sound Field synthesis (2014)
Journal Article

Most spatial audio reproduction systems have the constraint that all loudspeakers must be equidistant from the listener, a property which is difficult to achieve in real rooms. In traditional Ambisonics this arises because the spherical harmonic func... Read More about An energy interpretation of the Kirchhoff-Helmholtz boundary integral equation and its application to Sound Field synthesis.

Towards a full-bandwidth numerical acoustic model (2013)
Presentation / Conference
Hargreaves, J., & Lam, Y. (2013, June). Towards a full-bandwidth numerical acoustic model. Presented at 21st International Congress on Acoustics, 165th Meeting of the Acoustical Society of America, Montreal

Prediction models are at the heart of modern acoustic engineering and are used in a diverse range of applications from refining the acoustic design of classrooms and concert halls to predicting how noise exposure varies through an urban environment.... Read More about Towards a full-bandwidth numerical acoustic model.

A high-frequency BEM for 3D acoustic scattering
Presentation / Conference
Hargreaves, J., Lam, Y., Langdon, S., & Hewitt, D. A high-frequency BEM for 3D acoustic scattering. Presented at 22nd International Congress on Sound and Vibration, Florence. Italy

The Boundary Element Method (BEM) is a powerful method for simulating scattering of acoustic waves which has many advantages, particularly when the problem concerns an object in an unbounded medium. Its applications are however limited in practice be... Read More about A high-frequency BEM for 3D acoustic scattering.

Acoustic cross-energy measures and their applications
Presentation / Conference
Hargreaves, J., & Lam, Y. Acoustic cross-energy measures and their applications. Presented at The 22nd International Congress on Sound and Vibration, Florence. Italy

Acoustic energy density and acoustic intensity are quantities which are well established and widely applied. When these are applied to pressure and particle-velocity fields which are the linear superposition of more than one wave they naturally separ... Read More about Acoustic cross-energy measures and their applications.

Towards a full-bandwidth numerical acoustic model
Presentation / Conference
Hargreaves, J., & Lam, Y. Towards a full-bandwidth numerical acoustic model. Presented at Forum Acusticum, Krakow, Poland

Prediction models are at the heart of modern acoustic engineering and are used in a diverse range of applications from refining the acoustic design of classrooms and concert halls to predicting how noise exposure varies through an urban environment.... Read More about Towards a full-bandwidth numerical acoustic model.