RTE actual


Acoustic resonance analysis, also known as sound testing, is a non-destructive testing method (NDT) that enables fast and cost-effective testing of a large range of workpieces.

Source: rte.de

. It exploits the physical phenomenon of a body vibrating in response to an appropriate stimulus (e.g. impact), with specific characteristic natural modes and frequencies. This is the “language” of the workpiece. These sounds are used to assess the dynamic strength of the component, because any cracks, defects or other abnormalities in the material structure cause a change in the resonance spectrum. Acoustic material testing is a comparative test, where serial parts are tested against the resonance spectrum of so-called master parts (good and reject parts).

Acoustic resonance analysis is a volume testing method that evaluates the workpiece as a whole. In contrast to surface-specific methods such as endoscopy, dye penetrant inspection or magnetic particle testing, it enables a particularly fast and cost-effective evaluation of changes in the component’s bulk structure.


  • Material testing, crack testing, structural testing, identification testing
  • Resonance analysis, sound analysis, sound evaluation, sound sampling, sound testing
  • Structural Testing, Ductility, Nodularity
  • Natural frequency analysis, natural frequency measurement, natural frequency testing
  • Cast metals, magnetic and non-magnetic metals, ceramics, sintered products, glass
  • Alternatives or replacements for dye penetrant testing, eddy current testing, ultrasound, magnetic particle testing, X-ray testing

Source: RTE Akustik + Prüftechnik GmbH