Sound-source localization on flat-panel loudspeakers

Michael C. Heilemann, David Anderson, Mark F. Bocko

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

A method is described for creating a two-dimensional audio display by spatially controlling the bending vibrations of a panel. This method can simultaneously produce multiple audio sources on the surface of the panel using an array of independent force actuators to govern the size, shape, and location of each source. The minimum size of a source is determined by the spatial Nyquist frequency of the exciter array, and the spatial vibration profile of the panel may be dynamically controlled through signal processing. Demonstrations on a prototype panel with an optimized array of eight force exciters show that the vibration profile of the panel closely approximates the user-defined target shape at all frequencies within the bandwidth of the actuator array. Target shapes can be independently superimposed, giving the panel the capability of simultaneously reproducing multiple primary audio sources. In addition to primary source reproduction, one or more flat-panel loudspeakers employing this method can be used to render a specific sound-field for applications such as beam-forming or wave-field synthesis.

Original languageEnglish (US)
Pages (from-to)168-177
Number of pages10
JournalAES: Journal of the Audio Engineering Society
Volume65
Issue number3
DOIs
StatePublished - Mar 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2017 Journal of the Audio Engineering Society.

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