VALIDATION OF AN EIGENVALUE TECHNIQUE FOR ESTIMATING LOCALLY REACTING IMPEDANCES AT MODAL FREQUENCIES
Prinn AG, Walther A, Habets EA (2023)
Publication Type: Conference contribution
Publication year: 2023
Publisher: European Acoustics Association, EAA
Conference Proceedings Title: Proceedings of Forum Acusticum
Event location: Torino, ITA
ISBN: 9788888942674
Abstract
For computational room acoustics, accurate surface impedance data is needed to generate computational models that aim to provide accurate predictions. However, obtaining complex-valued frequency-dependent impedances of an acoustically absorbing material at low frequencies is a challenging task. In point of fact, the current measurement standard ISO 354:2003, which describes the measurement of absorption coefficients (which can be related to impedance) in a reverberation chamber, states that it is difficult to obtain reliable data below 100 Hz. There is therefore a need for advanced low-frequency measurement techniques. This paper presents a validation of a recently proposed eigenvalue-based inverse method for estimating locally reacting impedances at modal frequencies. The proposed method is validated using data measured in an impedance tube. This method can be used to estimate the sample impedance in reverberant rooms at low frequencies.
Involved external institutions
Germany (DE)How to cite
APA:
Prinn, A.G., Walther, A., & Habets, E.A. (2023). VALIDATION OF AN EIGENVALUE TECHNIQUE FOR ESTIMATING LOCALLY REACTING IMPEDANCES AT MODAL FREQUENCIES. In Proceedings of Forum Acusticum. Torino, ITA: European Acoustics Association, EAA.
MLA:
Prinn, Albert G., Andreas Walther, and Emanuël A.P. Habets. "VALIDATION OF AN EIGENVALUE TECHNIQUE FOR ESTIMATING LOCALLY REACTING IMPEDANCES AT MODAL FREQUENCIES." Proceedings of the 10th Convention of the European Acoustics Association, EAA 2023, Torino, ITA European Acoustics Association, EAA, 2023.
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