| 摘要 |
The invention relates to an acoustic panel comprising a reflecting layer, at least one cellular structure and an acoustically resistive structure forming an aerodynamic surface of an aircraft at the surface of which at least one acoustic wave is propagated along an axis of propagation (24), at least one of the characteristics of the acoustic panel influencing the impedance of said panel, which varies along the axis of propagation (24) of said at least one acoustic wave, characterized in that it comprises at least a first region A with a constant acoustic impedance juxtaposed, along the axis of propagation (24) of said at least one acoustic wave, with a region C at which at least one characteristic of the acoustic panel that influences the impedance varies progressively along the axis of propagation of said at least one acoustic wave, said characteristic having a value without sudden variations from one region to the other. |
