Dr Jonathan Hargreaves' Outputs (4)

A 'Surface-based' Geometrical Acoustic formulation within a Galerkin Boundary Element framework (2022)
Thesis
Emthyas, A. A 'Surface-based' Geometrical Acoustic formulation within a Galerkin Boundary Element framework. (Dissertation). University of Salford

As sound propagates within a room, it experiences high-order reflection, diffraction, and scattering. This causes the reflection density to increase over time, such that the sound field becomes diffuse and chaotic. Under these conditions, there is li... Read More about A 'Surface-based' Geometrical Acoustic formulation within a Galerkin Boundary Element framework.

Metric-based optimisation of acoustic lenses and waveguides (2022)
Thesis

This dissertation develops an automated procedure for the design of acoustic waveguides that can support single parameter (1P) wave propagation over a large bandwidth. 1P waves include plane, cylindrical and spherical waves, and the waveguides aim to... Read More about Metric-based optimisation of acoustic lenses and waveguides.

Modelling the perception of percussive low frequency instruments in rooms (2020)
Thesis
Howard, M. Modelling the perception of percussive low frequency instruments in rooms. (Dissertation). University of Salford

Throughout the study of room acoustics, adverse effects and methods of controlling
and mitigating modal behaviour are a well researched topic. However, despite this, a
gap between objective metrics and subjective results is still prevalent, thus re... Read More about Modelling the perception of percussive low frequency instruments in rooms.

Time domain boundary element method for room acoustics (2007)
Thesis
Hargreaves, J. Time domain boundary element method for room acoustics. (Thesis). University of Salford

This thesis is about improving the suitability of the time domain Boundary Element Method (BEM) for predicting the scattering from surface treatments used to improve the acoustics of rooms. The discretised integral equations are typically solved by m... Read More about Time domain boundary element method for room acoustics.