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Evaluation of ambisonics decoding methods with experimental measurements

Murillo Gomez, Diego M., Fazi, Filippo Maria and Shin, Mincheol (2014) Evaluation of ambisonics decoding methods with experimental measurements At EAA Joint Symposium on Auralization and Ambisonics, Germany. 03 - 05 Apr 2014.

Record type: Conference or Workshop Item (Paper)

Abstract

Ambisonics is a sound reproduction technique based on the decomposition of the sound field using spherical harmonics. The truncation in the number of coefficients used to recreate the sound field leads to reproduction artifacts which depend on the frequency and the listener spatial location. In this work, the performance of three different decoding methods (Basic, Max-rE and In-Phase) has been studied and evaluated in the light of the results of experimental measurements. The latter were performed using a spherical array composed of 40 uniformly distributed loudspeakers and a translating 29-channel linear microphone array. An error analysis is presented based on the difference between the desired and synthesized sound pressure and acoustic intensity field. The results indicate that, as expected, the size of the region of accurate sound field reconstruction reduces as frequency increases, but with different trends depending on the type of decoder implemented

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More information

e-pub ahead of print date: April 2014
Venue - Dates: EAA Joint Symposium on Auralization and Ambisonics, Germany, 2014-04-03 - 2014-04-05
Organisations: Acoustics Group

Identifiers

Local EPrints ID: 367955
URI: http://eprints.soton.ac.uk/id/eprint/367955
PURE UUID: 6c7b3303-a6aa-4c7b-a03f-5651588eb6ab

Catalogue record

Date deposited: 12 Sep 2014 09:19
Last modified: 18 Jul 2017 01:53

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Contributors

Author: Diego M. Murillo Gomez
Author: Mincheol Shin

University divisions

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