Development of Adaptive Acoustic Impedance Control Technologies of Acoustic Duct Liner

<table>Concept of adaptive acoustic impedance control technology III (both mobile reflective plate apparatus and tunable perforated plate—two parts control of acoustic impedance of liner).</table>

Advances in Acoustics and Vibration

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Figure 7

Figure 7: Development of Adaptive Acoustic Impedance Control Technologies of Acoustic Duct Liner 