Research Article
Development of Adaptive Acoustic Impedance Control Technologies of Acoustic Duct Liner
Table 2
Three models of AAC technology I, II, and III.
| | AAC technology I model | AAC technology II model | AAC technology III model |
| (1) Usage of apparatus | Mobile reflective plate apparatus | Tunable perforated plate apparatus | Both mobile reflective plate and tunable plate apparatuses |
| (2) Mainly controllable acoustic impedance part of liner | Reactance part of acoustic impedance of liner | Resistance part of acoustic impedance of liner | Both reactance and resistance parts of acoustic impedance of liner |
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