Multi-band low-frequency room correction with chameleon subwoofer arrays

Variations in the acoustic pressure response across a closed-space listening area result in inconsistent listening experiences dominant within the low-frequency band. An emerging solution proposed as the next evolutionary state in room correction systems involves an array of generalized subwoofers where each loudspeaker ha s a three-dimensional, frequencydependent polar response operating over multiple lo w-frequency bands; a configuration termed a chameleon subwoofer array. System optimiza tion is performed by measuring pressure responses at strategic room coordinates fr om which a set of orthogonal transfer functions is derived and applied to each degree of freedom within the array. The correction procedure benefits not only the set of discrete mea surement points, but all points within the defined listening area. Performance is validated by finite-difference time-domain acoustic simulation taken over a random walk within a virtua l acoustic listening space.