Circular Loudspeaker Array with Controllable Directivity

Martin Møller, Martin Olsen, Finn T. Agerkvist, Jakob Dyreby, Gert Munch

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch


Specific directivity patterns for circular arrays of loudspeakers can be achieved by utilizing the concept of phase-modes, which expands the directivity pattern into a series of circular harmonics. This paper investigates the applicability of this concept applied on a loudspeaker array on a cylindrical baffle, with a desired directivity pattern, which is specified in the frequency interval of 400–5000 Hz. From the specified frequency independent directivity pattern filter transfer functions for each loudspeaker are determined. The sensitivity of various parameters, related to practical implementation, is also investigated by introducing filter errors for each array element. Measurements on a small scale model using 2 inch drivers are compared with simulations, showing good agreement between experimental and predicted results.
Original languageEnglish
Title of host publicationProceedings of the 128th Audio Engineering Society Convention
Publication date2010
Publication statusPublished - 2010
Event128th Audio Engineering Society Convention - London, United Kingdom
Duration: 22 May 201025 May 2010
Conference number: 128


Conference128th Audio Engineering Society Convention
Country/TerritoryUnited Kingdom
Internet address


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