Validation of a Simple Spherical Head Model as a Signal Capture Device for Head-Movement-Aware Prediction of Perceived Spatial Impression

Brookes T, Kim C, Mason R. Validation of a Simple Spherical Head Model as a Signal Capture Device for Head-Movement-Aware Prediction of Perceived Spatial Impression. In: AES Conference: 40th International Conference: Spatial Audio: Sense the Sound of Space. Audio Engineering Society; 2010. Paper 4-1. Available from: https://aes.org/publications/elibrary-page/?id=15539

@inproceedings{Brookes2010_15539,
  author = {Brookes, Tim and Kim, Chungeun and Mason, Russell},
  title = {{Validation of a Simple Spherical Head Model as a Signal Capture Device for Head-Movement-Aware Prediction of Perceived Spatial Impression}},
  booktitle = {AES Conference: 40th International Conference: Spatial Audio: Sense the Sound of Space},
  note = {Paper 4-1},
  year = {2010},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=15539}
}

TY  - CPAPER
TI  - Validation of a Simple Spherical Head Model as a Signal Capture Device for Head-Movement-Aware Prediction of Perceived Spatial Impression
AU  - Brookes, Tim
AU  - Kim, Chungeun
AU  - Mason, Russell
T2  - AES Conference: 40th International Conference: Spatial Audio: Sense the Sound of Space
M1  - Paper 4-1
PY  - 2010
DA  - 2010/10/06
UR  - https://aes.org/publications/elibrary-page/?id=15539
PB  - Audio Engineering Society
LA  - en
AB  - In order to take head movement into account in objective evaluation of perceived spatial impression (including source direction), a suitable binaural capture device is required. A signal capture system was suggested that consisted of a head-sized sphere containing multiple pairs of microphones which, in comparison to a rotating head and torso simulator (HATS), has the potential for improved measurement speed and the capability to measure time varying systems, albeit at the expense of some accuracy. The error introduced by using a relatively simple sphere compared to a more physically accurate HATS was evaluated in terms of three binaural parameters related to perceived spatial impression – interaural time and level differences (ITD and ILD) and interaural cross-correlation coefficient (IACC). It was found that whilst the error in the IACC measurements was perceptually negligible, the differences in measured ITD and ILD values between the sphere and HATS were not perceptually negligible, although they were reduced slightly when the sphere was mounted on a torso. However, it was found that the sphere-with-torso could give accurate predictions of source location based on ITD and ILD, through the use of a look-up table created from known ITD-ILD-direction mappings. Therefore the validity of the sphere-with-torso as a potential head-movement-aware binaural signal capture device for perceptually relevant measurements of source direction (based on ITD and ILD) and spatial impression (based on IACC) was demonstrated.
ER  -