Optimal and Adaptive Virtual Unidirectional Sound Source in 
                        Active Noise Control

<table>Noise N5 attenuation using analytical VUSS
solution. — Spectrum with ANC, - - -  spectrum without ANC.</table>

Advances in Acoustics and Vibration

Figure 7: Optimal and Adaptive Virtual Unidirectional Sound Source in 
                        Active Noise Control 