Naslov
Discrete-Time Parametric Modeling of Loudspeakers Used for Active Noise Control in Long Narrow Ducts

Autori
Somek, Branko ; Dadić , Martin ; Fajt , Siniša

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
17th International Congress on Acoustics Proceedings / - Rim, 2001

Skup
17th International Congress on Acoustics

Mjesto i datum
Rim, Italija, 02.09.2001. - 07.09.2001

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
active noise control; loudspeakers; ducts

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA