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 Import into BibTeX
Subject: Evaluation of spatial audio
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=21490

Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:   /conv/151/10526.pdf

Start a discussion about this paper!