TY  - CHAP
U1  - Konferenzveröffentlichung
A1  - Grimm, Simon
A1  - Freudenberger, Jürgen
T1  - Hybrid Volterra and Hammerstein modelling of nonlinear acoustic systems
T2  - Fortschritte der Akustik : DAGA 2016, Aachen : 14.-17. März 2016 : 42. Jahrestagung für Akustik, Tagungsband
N2  - This paper studies suitable models for the identification of nonlinear acoustic systems. A cascaded structure of nonlinear filters is proposed that contains several parallel branches, consisting of polynomial functions followed by a linear filter for each order of nonlinearity. The second order of nonlinearity is additionally modelled with a parallel branch, containing a Volterra filter. These are followed by a long linear FIR filter that is able to model the room acoustics. The model is applied to the identification of a tube power amplifier feeding a guitar loudspeaker cabinet in an acoustic room. The adaptive identification is performed by the normalized least mean square (NLMS) algorithm. Compared with a generalized polynomial Hammerstein (GPH) model, the accuracy in modelling the dedicated real world system can be improved to a greater extend than increasing the order of nonlinearity in the GPH model.
Y1  - 2016
UR  - http://pub.dega-akustik.de/DAGA_2016/data/index.html
SN  - 978-3-939296-10-2
SB  - 978-3-939296-10-2
SP  - 1167
EP  - 1170
PB  - Dt. Gesellschaft für Akustik e.V.
CY  - Berlin
ER  -