Methods are proposed for modifying the reverberation characteristics of sound fields in rooms by employing a loudspeaker with adjustable directivity, realized with a compact spherical loudspeaker array (SLA). These methods are based on minimization and maximization of clarity and direct-to-reverberant sound ratio. Significant modification of reverberation is achieved by these methods, as shown in simulation studies. The system under investigation includes a spherical microphone array and an SLA comprising a multiple-input multiple-output system. The robustness of these methods to system identification errors is also investigated. Finally, reverberation and dereverberation results are validated by a listening experiment.

Authors: Morgenstern, Hai; Rafaely, Boaz
Affiliation: Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Be'er-Sheva, Israel
JAES Volume 65 Issue 1/2 pp. 42-55; January 2017
Publication Date: February 16, 2017

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