.~ By loading of specimen (e.g., strength of material test) {16}
801
.~.~ Acoustic emission
DEFINITION
Classification: 73/801
Acoustic emission:
(under subclass 788) Subject matter for detection of sonic-type waves emitted by the specimen as a result of the load induced strain.
(1) Note. An acoustic emission is generally an inaudible noise caused by minute changes in a material or object due to stresses imposed thereon. Thus, when a material undergoes a permanent deformation, it will generate a sound which may be monitored by ultrasensitive means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
587, for acoustic emission detection not accompanied by specimen loading.
