SAC	Sound Absorption Coefficient
DB	Delany-Bazley
JCA	Johnson-Champoux-Allard
JCAL	Johnson-Champoux-Allard-Lafarge
GRNN	Generalized Regression Neural Network
RBFNN	Radial Basis Function Neural Network
ANN	Artificial Neural Network
ML	Machine Learning
RUC	Representative Unit Cell
CFD	Computational Fluid Dynamics
μCT	Micro-Computed Tomography
CT	Computed Tomography
TMM	Transfer Matrix Method
IDNN	Integrated Deep Neural Network
CNN	Convolutional Neural Network
PAM	Parallel Acoustic Material
ASTM	American Society for Testing and Materials
ISO	International Organization for Standardization