Discrete-Time Parametric Modeling of Loudspeakers Used for Active Noise Control in Long Narrow Ducts (CROSBI ID 484691)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Somek, Branko ; Dadić , Martin ; Fajt , Siniša
engleski
Discrete-Time Parametric Modeling of Loudspeakers Used for Active Noise Control in Long Narrow Ducts
The secondary path in active noise control systems is generally consisted of electromechanical (loudspeakers) and acoustic elements. The secondary path is substantial part of any active noise control system. For adaptive systems, it influences on its convergence properties. For nonadaptive, it makes an additional term in control chain that can cause instability in closed-loop control. If the duct is long enough, the system will cancel the propagating acoustic wave before it reaches the end. This fact allows us to use infinite acoustic waveguide model for the duct, and to estimate loudspeaker acoustic load in such a way. The loudspeaker itself is modeled using electro-mechanical analogies, and obtained continuous-time model is transferred in z-domain using bilinear transformation. Proposed method can be made to include finite-length waveguides.
active noise control; loudspeakers; ducts
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Podaci o prilogu
2001.
objavljeno
Podaci o matičnoj publikaciji
17th International Congress on Acoustics Proceedings
Rim:
Podaci o skupu
17th International Congress on Acoustics
predavanje
02.09.2001-07.09.2001
Rim, Italija