Equivalent network of an open ended duct
Mechanically, the tube is equivalent to a mass, due the the inertial effects of the air.
If the effects of acoustic radiation are ignored, then, electrically, it is as if the load impedance is zero. |  |
 | Thus, the equivalent electrical circuit is a inductance
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Remarque :
If radiation is taken into account, the inductance is
, where
is the radiation mass, as shown in section 3.1.
