TY - JOUR
T1 - Estimation of effective parameters for microperforated panel absorbers and applications
AU - Liu, J.
AU - Hua, X.
AU - Herrin, D. W.
PY - 2014
Y1 - 2014
N2 - Microperforated panel absorbers are used in many noise control applications as an alternative to fibrous materials. In the past, perforations were circular in shape. However, perforations are now often pressed or cut into the metal. They are non-circular and are irregular shaped and are difficult to model. A nonlinear least squares data-fitting algorithm is utilized to estimate geometric parameters from measured absorption coefficient data. The circular perforation model proposed by Maa is used in the algorithm. The estimated geometric parameters are then used to calculate transfer impedance with good agreement compared to measured data. The procedure is then used to aid in understanding the effect of manufacturing variations, and dust and fluid contamination on the performance of microperforated panel absorbers.
AB - Microperforated panel absorbers are used in many noise control applications as an alternative to fibrous materials. In the past, perforations were circular in shape. However, perforations are now often pressed or cut into the metal. They are non-circular and are irregular shaped and are difficult to model. A nonlinear least squares data-fitting algorithm is utilized to estimate geometric parameters from measured absorption coefficient data. The circular perforation model proposed by Maa is used in the algorithm. The estimated geometric parameters are then used to calculate transfer impedance with good agreement compared to measured data. The procedure is then used to aid in understanding the effect of manufacturing variations, and dust and fluid contamination on the performance of microperforated panel absorbers.
KW - Microperforated panels
KW - Nonlinear least squares data fitting
KW - Sound absorption
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U2 - 10.1016/j.apacoust.2013.07.009
DO - 10.1016/j.apacoust.2013.07.009
M3 - Article
AN - SCOPUS:84882370705
SN - 0003-682X
VL - 75
SP - 86
EP - 93
JO - Applied Acoustics
JF - Applied Acoustics
IS - 1
ER -