resources

Sound zone audio





A sound zone system was realized (system diagram above). The following recordings, to download or listen in the browser, were made using a binaural dummy (pictured below). The experience will be enhanced by using headphones, and the target audio should appear to come from directly in front of the listener. Two cases are given. In the 'no sound zone control' case, a single loudspeaker is placed in front of each sound zone, each playing the target programme item. In the 'sound zone control active' case, an array of loudspeakers combines to achieve sound zones - creating a personalized audio stream for the listener inhabiting a zone. The sound zone filters are made using planarity control.

Target programme A: [ no sound zone control | sound zone control active]
Target programme B: [ no sound zone control | sound zone control active]







Phase animations

Phase animations are useful to visualize the properties of the sound field. A 60 channel circular array (as system diagram, pictured above) was used to reproduce 2 zones using various methods, and the sound field properties can be observed at 1 kHz in the animations below, which correspond to Figures 3.4 and 4.2 of the thesis. Zone A (lower) is the target zone.

The control methods are described in my JASA article and AES conference paper.

Brightness Control (note simple wave propagation)
Acoustic Contrast Control (note standing wave behaviour in target zone)
Planarity Control (note planar wave propagation)
Pressure Matching (note planar wave propagation)

Regularization animations

Regularization animations are useful to visualize the regularization effect on the sound field. A 60 channel circular array (as system diagram, pictured above) was used to reproduce 2 zones using various methods, and the sound field properties can be observed at 1 kHz in the animations below. Zone A (lower) is the target zone. In the following animations, corresponding to Figure E.1 in the thesis, the regularization is varied from minimum to maximum, then back to the optimal value in terms of achieved acoustic contrast:
[Acoustic Contrast Control | Planarity Control | Pressure Matching]