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Thursday, October 28 • 9:00pm - Friday, December 3 • 6:00pm
Effects of Near-field Sources on Ambisonics Recording and Playback

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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.

avatar for Raimundo Gonzalez

Raimundo Gonzalez

Post-Doctoral Researcher, Aalto University

Archontis Politis

Audio & Speech Processing Group, Tampere University of Technology

Tapio Lokki

Department of Signal Processing and Acoustics, Aalto University

Thursday October 28, 2021 9:00pm - Friday December 3, 2021 6:00pm EST