单词	acoustic emission
释义	acoustic emission noun physics : the production of sound waves by a material when it is subjected to stress also : the sound waves produced in this manner The elastic energy released when microcracks form should produce a stress wave and associated high-frequency acoustic emission … Smithsonian Example Sentences Recent Examples on the Web But there were two prior studies in 1992 and 2013 focusing on the acoustic emission of bubbles collapsing at a water surface more generally, revealing that the smallest bubbles emitted more of a chirp. Jennifer Ouellette, Ars Technica, 31 Dec. 2021 After seeing a couple of minutes’ worth of experimental data, the algorithm could begin to predict failure times based on the features of the acoustic emission alone. Quanta Magazine, 19 Sep. 2019 Word History First Known Use 1964, in the meaning defined above
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