AES E-Library

Design of a Compact Cylindrical Loudspeaker Array for Spatial Sound Reproduction

Building acoustic beamformers is a problem whose solution is hindered by the wide-band nature of audible sound. In order to achieve a consistent directional response over a wide range of frequencies, a conventional acoustic beamformer needs a high number of discrete loudspeakers and be large enough to achieve a desired low-frequency performance. The acoustic beamformer design described in this paper uses measurement-based optimized beamforming for loudspeakers mounted on a rigid cylindrical baffle. Super-directional beamforming enables achieving desired directivity with multiple loudspeakers at low frequencies. High frequencies are reproduced with a single loudspeaker, whose highly directional reproduction--due to the cylindrical baffle--matches the design goals. In addition to the beamformer filter design procedure, it is shown how such loudspeaker array can be used for spatial sound reproduction.

Authors: Kolundzija, Mihailo; Faller, Christof; Vetterli, Martin
Affiliations: Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland; University of California at Berkeley, Berkeley, CA, USA(See document for exact affiliation information.)
AES Convention:130 (May 2011) Paper Number:8336 Import into BibTeX
Subject:Multichannel/Spatial

Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD 130Papers)   /130/8336.pdf

Start a discussion about this paper!