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Wide-Area Psychoacoustic Correction for Problematic Room-Modes Using Nonlinear Bass Synthesis
Small rooms are characterized by low-frequency resonant modes, where traditional equalization systems may not efficiently correct the response at a few narrow frequency bands. A proposed supplementary approach based on virtual bass improves output efficiency while further reducing quality variations over a wide-area. The problematic low frequencies are reduced by the equalization system and are processed to create the illusion of the reduced bass by adding harmonics of those frequencies. Subjective testing showed that the seat-to-seat variation in quality was significantly reduced but the amount of virtual bass must be limited to avoid the perception of distortion.
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