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Acoustic emission (AE) techniques have successfully been used for assuring the structural integrity of large rocket motorcases since 1963, and their uses have expanded to ever larger structures, especially as structural health monitoring (SHM) of large structures has become the most urgent task for engineering communities around the world. The needs for advanced AE monitoring methods are felt keenly by those dealing with aging infrastructures. Many publications have appeared covering various aspects of AE techniques, but documentation of actual applications of AE techniques has been mostly limited to reports of successful results without technical details that allow objective evaluation of the results. There are some exceptions in the literature. In this Special Issue of the Acoustics section of Applied Sciences, we seek contributions covering these exceptions cited here. Here, we seek contributions describing case histories of AE applications to large structures that have achieved the goals of SHM by providing adequate technical information supporting the success stories. Types of structures can include aerospace and geological structures, bridges, buildings, factories, maritime facilities, off-shore structures, etc. Experiences with AE monitoring methods designed and proven for large stru

acoustic emission --- thermal cracking --- asphalt pavements --- embrittlement temperatures --- recycled asphalt pavements --- recycled asphalt shingles --- cooling cycles --- closed-form solution --- outlier --- time difference of arrival --- weight estimation --- structural diagnosis --- attenuation --- source location --- sensing --- signal processing --- structural health monitoring --- time series analysis --- b-value --- natural time --- critical phenomena --- reliability --- structural integrity --- crack growth --- fatigue life prediction --- uncertainty analysis --- nondestructive testing --- non-destructive testing --- hydrotreater --- bridge --- high temperature --- gas adsorber --- rotary kiln --- dragline --- acoustic emission (AE) --- non-destructive methods (NDT) --- diagnostic methods --- bridges --- structural health monitoring (SHM) --- acoustic emission swarm --- 2011 Tohoku earthquake --- repeating earthquake --- multiplet --- crustal movement --- optimized EEMD --- 2D-MUSIC --- composite structure --- impact localization --- part qualification --- structural design --- composites --- nondestructive evaluation (NDE) --- in situ acoustic emission (AE) monitoring --- mines --- host rock --- remote monitoring --- corrosion --- nuclear facilities --- alkali-silica reaction --- pattern recognition --- confinement --- damage evaluation --- beam --- vibration --- high-rate dynamics --- n/a