Investigation on localisation accuracy for first and higher order ambisonics reproduced sound sources

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Ambisonics and higher order ambisonics (HOA) technologies aim at reproducing sound field either synthesised or previously recorded with dedicated microphones. Based on a spherical harmonic decomposition, the sound field is more precisely described when higher-order components are used. The presented study evaluated the perceptual and objective localisation accuracy of the sound field encoded with four microphones of order one to four and decoded over a ring of loudspeakers. A perceptual test showed an improvement of the localisation with higher order ambisonic microphones. Reproduced localisation indices were estimated for the four microphones and the respective synthetic systems of order one to four. The perceptual and objective analysis revealed the same conclusions. The localisation accuracy depends on the ambisonic order as well as the source incidence. Furthermore, impairments linked to the microphones were highlighted.
Original languageEnglish
Number of pages16
Pages642-657
JournalActa Acustica united with Acustica
Journal publication dateJul 2013
Issue4
Volume99
DOIs
StatePublished

Research areas

  • ambisonics, higher order ambisonics, localisation, HOA microphone, objective analysis, perceptual test

ID: 898181