Understanding Acoustic Emission Testing- Reading 1 Part B-A

Nevertheless, even after this pioneering work, progress in applying acoustic
emission techniques remains slow. An extensive review by Diederichs et al.
(et al means: and others), covers the literature on acoustic emissions from
concrete up to 1983. However, as late as 1976, Malhotra noted that there was
little published data in this area, and that “acoustic emission methods are in
their infancy.” Even in January, 1988, a thorough computer-aided search of
the literature found only some 90 papers dealing with acoustic emissions from
concrete over about the previous 10 years; while this is almost certainly not a
complete list, it does indicate that there is much work to be carried out before
acoustic emission monitoring becomes a common technique for testing
concrete. Indeed, there are still no standard test methods which have even
been suggested for this purpose.
Charlie Chong/ Fion Zhang