SPHERICAL HARMONIC DECOMPOSITION OF A SOUND FIELD BASED ON MICROPHONES AROUND THE CIRCUMFERENCE OF A HUMAN HEAD

被引：3

作者：

Ahrens, Jens ^{[1
]}

Helmholz, Hannes ^{[1
]}

Alon, David Lou ^{[2
]}

Gari, Sebastia V. Amengual ^{[2
]}

机构：

[1] Chalmers Univ Technol, S-41296 Gothenburg, Sweden

[2] Facebook, Facebook Real Labs Res, 1 Hacker Way, Menlo Pk, CA 94025 USA

来源：

2021 IEEE WORKSHOP ON APPLICATIONS OF SIGNAL PROCESSING TO AUDIO AND ACOUSTICS (WASPAA) | 2021年

关键词：

Binaural rendering; spherical harmonics; microphone array; augmented reality; ARRAY;

D O I：

10.1109/WASPAA52581.2021.9632751

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

We present a method for decomposing a sound field into spherical harmonics (SH) based on observations of the sound field around the circumference of a human head. The method is based on the analytical solution for observations of the sound field along the equator of a rigid sphere that we presented recently. The present method incorporates a calibration stage in which the microphone signals for sound sources at a suitable set of calibration positions are projected onto the SH decomposition of the same sound field on the surface of a notional rigid sphere by means of a linear filtering operation. The filter coefficients are computed from the calibration data via a least-squares fit. We present an evaluation of the method based on binaural rendering of numerically simulated signals for an array of 18 microphones providing 8th SH order to demonstrate its effectiveness.

引用

页码：231 / 235

页数：5

共 22 条

[1]

Ahrens J., IN PRESS, V2021

[2]

Ahrens J., 2021, IEEE ICASSP

[3]

Ahrens J., P IMM 3D AUD ARCH AU, V2021, P1

[4]

Bernschutz B., 2013, FORTSCHRITTE AKUSTIK, P592

[5]

Boyd Stephen, 2004, CONVEX OPTIMIZATION

[6]

Bronkhorst A. W., 2017, M P RTO MP HFM 123 N

[7]

Calamia P, 2017, IEEE WORK APPL SIG, P96, DOI 10.1109/WASPAA.2017.8170002

[8]

Doclo S., 2010, Handbook on Array Processing and Sensor Networks, P269, DOI DOI 10.1002/9780470487068.CH9

[9]

Frank M., AMBISONICS PRACTICAL

[10]

Greenberg JE, 2001, DIGITAL SIGNAL PROC, P229

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