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Compact spherical loudspeaker arrays exhibit controllable directivity, and electroacoustic music recently became interested in using their beamforming capacities to compose spatial music. In particular, directivities of 3rd-order or higher turned out to o?er a suÿciently precise horizontal control. Our engineering brief proposes the 170 compact spherical loudspeaker design that is DIY-3D-printable and only uses 8 audio channels. The 170 array houses seven 2.5” broadband transducers that allow third-order horizontal beamforming and a 6” subwoofer. We make the CAD model, electroacoustic measurements, and control filters openly accessible and show it’s beampatterns for verification, based on those measurements.
Author (s): Drack, Valerian; Zotter, Franz; Barrett, Natasha
Affiliation:
University of Technology, Graz; Institute of Electronic Music and Acoustics, University of Music and Performing Arts, Graz, Austria; Norwegian Academy for Music
(See document for exact affiliation information.)
AES Convention: 148
Paper Number:607
Publication Date:
2020-05-06
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Session subject:
Loudspeakers & Microphones
Permalink: https://aes2.org/publications/elibrary-page/?id=20845
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Drack, Valerian; Zotter, Franz; Barrett, Natasha; 2020; A personal, 3D printable compact spherical loudspeaker array [PDF]; University of Technology, Graz; Institute of Electronic Music and Acoustics, University of Music and Performing Arts, Graz, Austria; Norwegian Academy for Music; Paper 607; Available from: https://aes2.org/publications/elibrary-page/?id=20845
Drack, Valerian; Zotter, Franz; Barrett, Natasha; A personal, 3D printable compact spherical loudspeaker array [PDF]; University of Technology, Graz; Institute of Electronic Music and Acoustics, University of Music and Performing Arts, Graz, Austria; Norwegian Academy for Music; Paper 607; 2020 Available: https://aes2.org/publications/elibrary-page/?id=20845