This paper describes a loudspeaker cube with four transducers on its horizontal facets, designed to enable sound radiation with adjustable first-order beam control. Design and equipping of the cubical loudspeaker is presented along with two open data sets containing multiple-input-multiple-output impulse responses (MIMO-IRs) of our measurements. The first one contains 648x 4 MIMO-IRs from input voltages to a grid of microphones at a fixed distance. The second set contains 4x 4 MIMO-IRs from input voltages to loudspeaker cone velocities, and it characterizes the active and passive transducer coupling through the enclosure that we aim to equalize/decouple. Based on these measurements we present a simple FIR filter design required for beam control of which we discuss operation range and limitations.

Authors: Meyer-Kahlen, Nils; Zotter, Franz; Pollack, Katharina
Affiliations: University of Technology Graz, Graz, Austria; University of Music and Performaing Arts Graz;(See document for exact affiliation information.)
AES Convention: 144 (May 2018) eBrief:447
Publication Date: May 14, 2018 Import into BibTeX
Subject: Transducers & Psychoacoustics
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=19559

Download Now (903 KB)

This paper is Open Access which means you can download it for free.

Learn more about the AES E-Library

The Engineering Briefs at this Convention were selected on the basis of a submitted synopsis, ensuring that they are of interest to AES members, and are not overly commercial. These briefs have been reproduced from the authors' advance manuscripts, without editing, corrections, or consideration by the Review Board. The AES takes no responsibility for their contents. Paper copies are not available, but any member can freely access these briefs. Members are encouraged to provide comments that enhance their usefulness.

Start a discussion about this paper!