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Pressure Matching With Forced Filters for Personal Sound Zones Application

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This paper presents a rethinking of the Pressure Matching Method (PM) used in the generation of Personal Sound Zones when the responses of some filters are already known. They are then imposed in the calculation, resulting in a Forced Pressure Matching method. This new formulation is implemented to control two zones—a reproduction zone and dark zone—in a two-seat configuration aimed toward the Transportation industry. Due to variations in transportation acoustic environments, the computational time is added to the metrics typically used in the Personal Sound Zones literature (such as acoustic contrast, effort, error, etc.), foreseeing the need of an adaptive system. Perfect Dirac delta functions were forced as filters of the loudspeakers closest to the reproduction zone. The new formulation achieved the same acoustic contrast, effort, and reproduction error very similar to that of the conventional PMbut calculated the filters 24% faster.

JAES Volume 68 Issue 11 pp. 832-842; November 2020
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