AS	Acoustic Source
AUGN	Additive Uncorrelated Gaussian Noise
AWGN	Additive White Gaussian Noise
CC	Cross-Correlation
CoV	Calculus of Variations
CU	Central Unit
CRB	Cramér–Rao Bound
CRMB	Cramér–Rao Matrix Bound
DDoA	Difference in Distance of Arrival
DoA	Direction of Arrival
DS-OC	Disk Sensors Optimal Cluster
DToA	Difference in Time of Arrival
Fs	Sampling Frequency
FT	Fourier Transform
GCC	Generalized Cross-Correlation
GM	Gauss Markov
GW	Guided Waves
IFT	Inverse Fourier Transform
ME	Maximum Error
ML	Maximum Likelihood
MSE	Mean Square Error
MUSIC	Multiple Signal Classification
PSNR	Peak Signal-to-Noise Ratio
RT	Radon Transform
IRT	Inverse Radon Transform
r.v.	random variable(s)
SC	Standard Cluster
SD	Standard Deviation
SGRP	Stationary Gaussian Random Processes
SHM	Structural Health Monitoring
SNR	Signal-to-Noise Ratio
SS-OC	Shaped Sensors Optimal Cluster
WGN	White Gaussian (zero-mean) Noise
2D-FT	Bi-dimensional Fourier Transform