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.
Authors:
Gonzalez, Raimundo; Politis Archontis; Lokki, Tapio
Affiliations:
Aalto University, Espoo, Finland; Tampere University of Technology,Tampere, Finland(See document for exact affiliation information.)
AES Convention:
151 (October 2021)
Paper Number:
10526
Publication Date:
October 13, 2021
Subject:
Evaluation of spatial audio
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