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2006-04-03
System Identification of Acoustic Characteristics of Enclosures with Resonant Second Order Dynamics
By
, Vol. 61, 89-110, 2006
Abstract
This research concerns offline identification of acoustic characteristics of enclosures with second-order resonant dynamics and their modeling as linear dynamic systems. The applied models can be described by basis function expansions. The practical problem of acoustic echo in enclosures is used as the target problem to be addressed. It has been found out that the classical filters are ineffective filter structures for approximating an echo generating system, due to their many required parameters. In order to reduce the number of estimated parameters, alternative methods for modeling the room impulse response need to be investigated. Out of various available techniques impulse response identification is utilized. With the help of given experimental data, the enclosures' impulse response is modeled using special orthonormal basis functions called Kautz functions. As another improved approximation, hybrid multistage system identifiers have been used in which the simplicity of classical filter structures and fast convergence of orthonormal structures is utilized as an advantage.
Citation
Shabbir Chaudhry Alina Chaudhr , "System Identification of Acoustic Characteristics of Enclosures with Resonant Second Order Dynamics," , Vol. 61, 89-110, 2006.
doi:10.2528/PIER06010702
http://www.jpier.org/PIER/pier.php?paper=0601072
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