Tag Archives: Thesis

New Paper: Localisation with Third Order Ambisonics and Off-Centre Listeners

Last month the last paper from work done during my thesis was published in the Journal of the Audio Engineering Society. We tested localisation for off-centre listeners with third order Ambisonics for two different noise signals: transient and non-transient. We found, in line with Precedence Effect literature, that the transient signal produced sound images pulled more towards the nearer loudspeakers than the non-transient signal.

We also tested different localisation models. All of them were relatively good at predicting the perceptual results. The best results were obtained by an extended version of Gerzon’s energy vector that includes elements of localisation dominances and the precedence effect (See here for an overview and here for the paper).

P. Stitt, S. Bertet, and M. van Walstijn, “Off-Centre Listening with Third-Order Ambisonics: Dependence of Perceived Source Direction on Signal Type,” J. Audio Eng. Soc., vol. 65, no. 3, pp. 118–197, 2017.

Links: DOI ResearchGate

 

Thesis… coming soon…

So my thesis is all signed off and I should hopefully upload it (probably to ResearchGate) some time soon. As a teaser, here are some of the main points covered:

  • A review of spatial hearing, plus reviews of some important binaural and vector models for prediction.
  • A review of Ambisonics and Higher Order Ambisonics (HOA).
  • Results of three perceptual experiments for Ambisonics and HOA at off-centre positions.
  • Comparison of the binaural models and Gerzon’s energy vector to the perceptual results.
  • An extension to Gerzon’s energy vector to include elements of the precedence effect for more accurate predictions at off-centre positions.