Optimal and Adaptive Virtual Unidirectional Sound Source in 
                        Active Noise Control

<table>Comparison of attenuation
of tonal sounds for analytical and adaptive VUSS filter tuning. —  
FXLMS algorithm with analytical tuning, - - -  RLS algorithm with analytical tuning, ... 
RLS algorithm with adaptive tuning.</table>

Advances in Acoustics and Vibration

fig11

Figure 11

Figure 11: Optimal and Adaptive Virtual Unidirectional Sound Source in 
                        Active Noise Control 

Advances in Acoustics and Vibration

Optimal and Adaptive Virtual Unidirectional Sound Source in Active Noise Control

Figure 11