Block-Based Perceptually Adaptive Sound Zones With Reproduction Error Constraints
Niels de Koeijer, Martin Bo Møller, Jorge Martínez, Pablo Martínez-Nuevo, Richard Christian Hendriks · IEEE/ACM Transactions on Audio Speech and Language Processing · 2024
Sound zone algorithms control the inputs to a loudspeaker array such that spatially distinct zones, each with separate audio content, are created. This work proposes a sound zone approach which includes a model of human auditory perception in the optimization problem designing the loudspeaker control filters. The control filters are therefore optimized directly for human experience, rather than by proxy through sound pressure, as is done in typical approaches. The proposed optimization problem features a perceptually weighted constraint on the bright zone reproduction error, which allows the user of the algorithm to specify the desired bright zone quality. The proposed method achieves 2 to 4 dB of additional acoustic contrast and is expected to yield less distracting dark-zone interference for the same perceived quality when compared to a traditional approach.