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Acoustic Rendering of an Interior Space Using the Holographically Designed Sound Array

It was reported that the filter for the acoustic array can be inversely designed in a holographic way, which was demonstrated in a free-field. In this study, the same method using the boundary element method (BEM) was employed to render the interior sound field in an acoustically desired fashion. Because the inverse BEM technique can deal with arbitrary shaped source or bounding surfaces, one can simultaneously consider the effect of irregular radiation surface and reflection boundaries having impedances such as walls, floor, and ceiling. To examine the applicability, a field rendering example was tested to control the relative spatial distribution of sound pressure in the enclosed field.

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