Spatial Reverberation and Dereverberation using an Acoustic Multiple-Input Multiple-Output System

Author:

Hai Morgenstern, Boaz Rafaely

Keyword:

Electrical Engineering and Systems Science, Audio and Speech Processing, Audio and Speech Processing (eess.AS), Sound (cs.SD)

journal:

J. Audio Eng. Soc, vol. 65, no. 1/2, pp. 42-55, 2017

date:

2024-01-07 00:00:00

Abstract

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.

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