Publications

Media Articles

• Cambridge Evening News, Baddeley brings order out of business chaos, Cambridge Evening News, the Business, 13 September 2005
• Simon Grose, Hark the harmonics - you'll think it's angles singing, The Canberra Times, Computing Section, 27 December 2004
• David Excell, Home theatre for your ears, ScienceWise, June 2004

Undergraduate Thesis

In this thesis the fundamental problem in signal processing of controlling a sound field within a region of space is studied. Using spherical and cylindrical harmonics, reproduction systems in both two and three dimensions have been designed. From the design of the systems, equations are derived describing the performance of the system for arbitrary sound fields. The equations are defined in terms of the number of loudspeakers, the size of the listening area and the frequency content of the sound fields.

Results from numerical verification have been included within this thesis. The implementation of the 2D system is also included in this thesis demonstrating the ability of the designed system to reproduce `real' sound fields. In the implementation process, a synthesis system was developed allowing conventionally recorded sound samples to be placed in 2D space forming a spatial sound field. In the process it is demonstrated that the reproduction system does not solely use amplitude panning techniques but also considers the phase and delay of the sound field components to recreate the sound field.