The development and use of a noninvasive technique to monitor the acoustic emissions (AEs) generated during the oedometric compression of coarse-grained soil are documented. Technique implementation is described with the aid of experiments conducted on sands with contrasting grain features. Results indicate that the proposed technique is capable of capturing the onset of characteristic stress-strain behavior regimes exhibited by the soil during loading. The clarity of such capture is, however, dependent on the amplitude of the AE relative to that of the background noise and, as such, dependent on the soil type. The technique is anticipated to aid in enhancing the fundamental study of soil behavior at high stresses and may find potential use in the realm of penetrometer-based stratigraphy characterization.
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