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Investigation of the Perceived Spatial Resolution of Higher Order Ambisonic Sound Fields: A Subjective Evaluation Involving Virtual and Real 3D Microphones

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text
 

Genre(s)

article
 

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document imprimé
 

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Titre

Investigation of the Perceived Spatial Resolution of Higher Order Ambisonic Sound Fields: A Subjective Evaluation Involving Virtual and Real 3D Microphones
 

Nom(s)

Bertet, Stéphanie (auteur)
 
Daniel, Jérôme (auteur)
 
Parizet, Etienne (auteur)
 
Gros, Laetitia (auteur)
 
Warusfel, Olivier (auteur)
 

Publication

Saariselkä, Finlande , 2007
 

Description

Sujet(s)

Ambisonic   spatial reproduction
 

Résumé

Natural sound fields can be reproduced through loudspeakers using ambisonic and Higher Order Ambisonic (HOA) microphone recordings. The HOA sound field encoding approach is based on a spherical harmonic decomposition. The more components are used to encode the sound field, the finer the spatial resolution is. Two HOA (2nd and 4th order) microphone prototypes were developed as a result of previous studies. To evaluate the perceived spatial resolution and encoding artefacts on the horizontal plane, a localisation test was performed comparing the performances of the two prototypes with those of a SoundField microphone and an ideal 4th order encoder. The HOA reproduction system was composed of 12 equiangular spaced loudspeakers disposed along a circle twelve loudspeakers equally distributed on a circle. Thirteen target positions were chosen around the listener. An adjustment method using an auditory pointer was used to avoid bias effects of usual reporting methods. The human localisation error occurring for each of the tested systems was compared. A statistical analysis showed significance differences when using the 4th order system, the 2nd order system and the SoundField microphone.
 

Note(s)

Contribution au colloque ou congrès : 30th AES Conference - Intelligent Audio Environnments
 

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Date de la notice

2014-10-30 01:00:00
 

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