Reproduction of a higher-order circular harmonic field using a linear array of loudspeakers | Zendy

Jungmin Lee | Zendy; JungWoo Choi | Zendy; YangHann Kim | Zendy

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Reproduction of a higher-order circular harmonic field using a linear array of loudspeakers

Author(s) -

Jungmin Lee,

JungWoo Choi,

YangHann Kim

Publication year - 2015

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.4905880

Subject(s) - loudspeaker , harmonics , acoustics , harmonic , field (mathematics) , directional sound , spherical harmonics , sound recording and reproduction , variation (astronomy) , phase (matter) , harmonic analysis , circular buffer , mathematics , physics , computer science , mathematical analysis , quantum mechanics , voltage , astrophysics , pure mathematics , programming language

This paper presents a direct formula for reproducing a sound field consisting of higher-order circular harmonics with polar phase variation. Sound fields with phase variation can be used for synthesizing various spatial attributes, such as the perceived width or the location of a virtual sound source. To reproduce such a sound field using a linear loudspeaker array, the driving function of the array is derived in the format of an integral formula. The proposed function shows fewer reproduction errors than a conventional formula focused on magnitude variations. In addition, analysis of the sweet spot reveals that its shape can be asymmetric, depending on the order of harmonics.

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