Evaluation of ambisonics decoding methods with experimental
measurements
Evaluation of ambisonics decoding methods with experimental
measurements
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
Murillo Gomez, Diego M.
21406e29-0bad-4420-810b-719706df5430
Fazi, Filippo Maria
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Shin, Mincheol
2c911163-f027-4c79-8a7b-368f326c46e7
Murillo Gomez, Diego M.
21406e29-0bad-4420-810b-719706df5430
Fazi, Filippo Maria
e5aefc08-ab45-47c1-ad69-c3f12d07d807
Shin, Mincheol
2c911163-f027-4c79-8a7b-368f326c46e7
Murillo Gomez, Diego M., Fazi, Filippo Maria and Shin, Mincheol
(2014)
Evaluation of ambisonics decoding methods with experimental
measurements.
EAA Joint Symposium on Auralization and Ambisonics, Berlin, 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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auraambi2014_Murillo.pdf
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e-pub ahead of print date: April 2014
Venue - Dates:
EAA Joint Symposium on Auralization and Ambisonics, Berlin, 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
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Date deposited: 12 Sep 2014 09:19
Last modified: 15 Mar 2024 03:32
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Contributors
Author:
Diego M. Murillo Gomez
Author:
Mincheol Shin
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