Reproduction of nearby sound sources using higher-order ambisonics with practical loudspeaker arrays

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Reproduction of nearby sound sources using higher-order ambisonics with practical loudspeaker arrays. / Favrot, Sylvain Emmanuel; Buchholz, Jörg.

In: Acustica United with Acta Acustica, Vol. 98, No. 1, 2012, p. 48-60.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Favrot, Sylvain Emmanuel; Buchholz, Jörg / Reproduction of nearby sound sources using higher-order ambisonics with practical loudspeaker arrays.

In: Acustica United with Acta Acustica, Vol. 98, No. 1, 2012, p. 48-60.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{71095334f89d4b70a56fc6e5ca182a72,
title = "Reproduction of nearby sound sources using higher-order ambisonics with practical loudspeaker arrays",
keywords = "Sound source, Practical realizations, Higher order, Acoustic generators, Interaural level differences, Acoustic fields, Acoustic field measurement, Listening tests, Point sources, Regularization function, Loudspeaker array, Depth perception, Virtual sources, Improved distance, Near fields, Loudspeakers",
publisher = "S./Hirzel Verlag",
author = "Favrot, {Sylvain Emmanuel} and Jörg Buchholz",
year = "2012",
doi = "10.3813/AAA.918491",
volume = "98",
number = "1",
pages = "48--60",
journal = "Acustica United with Acta Acustica",
issn = "1610-1928",

}

RIS

TY - JOUR

T1 - Reproduction of nearby sound sources using higher-order ambisonics with practical loudspeaker arrays

A1 - Favrot,Sylvain Emmanuel

A1 - Buchholz,Jörg

AU - Favrot,Sylvain Emmanuel

AU - Buchholz,Jörg

PB - S./Hirzel Verlag

PY - 2012

Y1 - 2012

N2 - In order to reproduce nearby sound sources with distant loudspeakers to a single listener, the near field compensated (NFC) method for higher-order Ambisonics (HOA) has been previously proposed. In practical realization, this method requires the use of regularization functions. This study analyzes the impact of two existing and a new proposed regularization function on the reproduced sound fields and on the main auditory cue for nearby sound sources outside the median plane, i.e, low-frequencies interaural level differences (ILDs). The proposed regularization function led to a better reproduction of point source sound fields compared to existing regularization functions for NFC-HOA. Measurements in realistic playback environments showed that, for very close sources, significant ILDs for frequencies above about 250 Hz can be reproduced with NFC-HOA and the proposed regularization function whereas the existing regularization functions failed to provide ILDs below 500 Hz. A listening test showed that these lower-frequency ILDs provided by the proposed regularization function lead to a significantly improved distance perception performance. This test also showed that the distance of virtual sources are perceived less accurately than corresponding physical sources when amplitude cues are not available. © S. Hirzel Verlag · EAA.

AB - In order to reproduce nearby sound sources with distant loudspeakers to a single listener, the near field compensated (NFC) method for higher-order Ambisonics (HOA) has been previously proposed. In practical realization, this method requires the use of regularization functions. This study analyzes the impact of two existing and a new proposed regularization function on the reproduced sound fields and on the main auditory cue for nearby sound sources outside the median plane, i.e, low-frequencies interaural level differences (ILDs). The proposed regularization function led to a better reproduction of point source sound fields compared to existing regularization functions for NFC-HOA. Measurements in realistic playback environments showed that, for very close sources, significant ILDs for frequencies above about 250 Hz can be reproduced with NFC-HOA and the proposed regularization function whereas the existing regularization functions failed to provide ILDs below 500 Hz. A listening test showed that these lower-frequency ILDs provided by the proposed regularization function lead to a significantly improved distance perception performance. This test also showed that the distance of virtual sources are perceived less accurately than corresponding physical sources when amplitude cues are not available. © S. Hirzel Verlag · EAA.

KW - Sound source

KW - Practical realizations

KW - Higher order

KW - Acoustic generators

KW - Interaural level differences

KW - Acoustic fields

KW - Acoustic field measurement

KW - Listening tests

KW - Point sources

KW - Regularization function

KW - Loudspeaker array

KW - Depth perception

KW - Virtual sources

KW - Improved distance

KW - Near fields

KW - Loudspeakers

U2 - 10.3813/AAA.918491

DO - 10.3813/AAA.918491

JO - Acustica United with Acta Acustica

JF - Acustica United with Acta Acustica

SN - 1610-1928

IS - 1

VL - 98

SP - 48

EP - 60

ER -