TS EN 1330-9

TS EN 1330-9 is a terminology standard for non-destructive testing, focused on the terms used in acoustic emission testing. It brings together the vocabulary needed to describe the physical phenomenon, the detection of acoustic emission, the measured characteristics of the signal, and the broader application context of the method.

How the acoustic emission vocabulary is organised

Acoustic emission refers to transient elastic waves released by a material or structure when it experiences processes such as cracking, plastic deformation, friction, or other localised changes. In practice, sensors and acquisition equipment detect these waves so that active damage processes can be monitored while they occur. The emphasis of this standard is not on prescribing a test procedure, but on ensuring that the terms used in this field are defined and understood consistently.

Four groups of terms in use

• Terms related to the physical phenomenon: concepts covering how acoustic emission is generated and propagates.
• Terms related to detection: expressions describing sensors, detection chains, and signal capture.
• Terms related to measured signal characteristics: terms such as amplitude, counts, energy, and other signal descriptors.
• Terms related to acoustic emission applications: vocabulary used when the method is applied in inspection and assessment contexts.

Standardised terminology matters because it reduces ambiguity between laboratories, manufacturers, and users. This is especially important in non-destructive testing, where acoustic emission is used to observe active processes in a structure rather than a visible surface defect. TS EN 1330-9 serves as part of that shared technical language, helping ensure that the same concept is referred to in the same way across the field.