Effects of near-field sources on ambisonics recording and playback

Raimundo Gonzalez Diaz*, Archontis Politis, Tapio Lokki

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Abstract

Ambisonic recording with spherical microphone arrays (SMAs) is based on a far-field assumption which determines how microphone signals are encoded into Ambisonic signals. In the presence of a near-field source, low-frequency distance-dependent boosts arise in SMAs in similar nature to proximity effects in far-field equalized directional microphones. In this study, the effects of near-field sources on Ambisonic signals are modelled analytically, their interaction with regularization stages is observed, and then traced further across to two basic ambisonic processing operations: virtual microphones, and binaural decoding.
Original languageEnglish
Title of host publicationthe AES 151st International Convention
PublisherAudio Engineering Society
Number of pages8
Publication statusAccepted/In press - Oct 2021
MoE publication typeA4 Article in a conference publication
EventAudio Engineering Society Convention - Virtual, Online
Duration: 13 Oct 202131 Oct 2021
Conference number: 151
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Conference

ConferenceAudio Engineering Society Convention
Abbreviated titleAES
CityVirtual, Online
Period13/10/202131/10/2021
Internet address

Keywords

  • ambisonics
  • virtual acoustics
  • near-field
  • audio

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