Seminar 28th May 2014 12:30 p.m. Building 13, Room 3019, Highfield Campus, University of Southampton
A common acoustic energy flow metric for spatial audio and the boundary element method
Dr Jonathan Hargreaves
University of Salford
- Web page
- http://www.seek.salford.ac.uk/profiles/J.A.HARGREAVES.jsp
- Submitter
- Luke Goater
Dr Hargreaves
Abstract :
It is well known that the ability to sense both pressure and its gradient is advantageous when attempting to measure a sound-field on a surface and then extrapolate that data out into the surrounding volume. Open spherical arrays of omnidirectional microphones, for example, suffer from frequencies at which the required corrective equalisation becomes infinite. A similar issue occurs in the Boundary Element Method (BEM), where certain frequencies do not possess unique solutions. In both these cases problems occur because pressure alone was sensed on the surface. Solutions to these various specific problems already exist, however this talk will look at the parallels between them and investigate how they fit into a wider framework which arises from considering ‘common acoustic energy flow’. Applications include design of new microphone arrays and virtual acoustic models.
Biography :
Dr Jonathan Hargreaves, Acoustics Research Centre, University of Salford Jonathan was awarded an MEng in Engineering & Computing Science from the University of Oxford in 2000 and a PhD in Acoustic Engineering from the University of Salford in 2007, where he remains as a post-doctoral Research Fellow. The title of his PhD thesis was “Time Domain Boundary Element Methods for Room Acoustics” and this remains one of his active research areas. At present he is Researcher Co-Investigator on an EPSRC funded project in partnership with the University of Reading, Arup Acoustics and BBC Audio R&D. This aims to develop improved acoustic modelling software, which properly includes wave phenomena, and couple it to audio hardware, enabling the sound of buildings to be experienced before they are constructed or long after they are lost. Jonathan has had the pleasure of being involved in a wide variety of public engagement activities, including a number of TV appearances, and is passionate about performing, engineering and enjoying live music.