Acoustic Material Testing

Acoustic resonance analysis, which is also referred to as sound testing, is a nondestructive testing method, which enables a wide range of workpieces to be tested rapidly and inexpensively. The physical effect, that a body, which has been stimulated suitably (for example, by being struck) vibrates in certain characteristic eigenmodes and Eigenfrequencies, is utilized here. They are the “language” of the workpiece. The dynamic strength of the component is evaluated, because any cracks, defects or other material structure deviations, which may be present, cause a change in the resonance spectrum. The acoustic testing of materials is a comparative testing, in which serially produced parts are tested against the resonance spectrum of so-called master parts (good parts).

Zerstörungsfreie Prüfverfahren
Volumenorientierte Verfahren
Akustische Verfahren
  • Resonanzanalyse (ART)
  • Schallemission (AE)
  • Ultraschall (UT)
  • Radioskopie (RS)
  • Röntgen-/Gammastrahlen (RT)
Oberflächenorientierte Verfahren
Visuelle Verfahren
  • Farbeindringung (PT)
  • Magnetpulver (MT)
  • Sichtprüfung (VT)
  • Thermografie (IRT)
Magnetische Verfahren
  • Wirbelstrom (ET)

Acoustic resonance analysis is a volume-oriented test method, which evaluates the workpiece as a whole. In contrast to surface-oriented methods, such as endoscopy, color penetration testing or magnetic powder testing, it makes possible a particularly rapid and inexpensive assessment of changes in the structure of the component.

For example, the analog time signal and the digital resonance spectrum of a workpiece are shown in Figures 1 and 2. The peaks are the resonance frequencies.

Akustische Materialprüftechnik

From the resonance frequencies, characteristic workpiece values can be calculated and quality criteria assigned, such as OK, cracks, structure properties, hardness and mass variations.

Testing Technique: RTE offers a high-performance system with short cycle times and an excellent price to performance ratio.  The test system offers different expansion modules, such as compensation methods for unavoidable influencing factors during the production process (batch, age).  The results are documented simply and quickly.  Further information concerning SonicTC.AT.


Your client will be sold on the quality of the goods, which you have supplied!

  • Faults can be recognized, which can be recognized only partly, if at all, with other nondestructive methods
  • You save on consumable materials and lower disposal costs
  • Acoustic methods are environmentally friendly. Chemical or radiating additives are not required
  • Objectively reliable instead of subjectively uncertain quality decisions
  • Acoustic methods are work- and safety-friendly
  • They do not require any certified personnel


Acoustic resonance analysis is a versatile, method, which can be used for the nondestructive testing of materials:

  • material testing, crack testing, structure testing and testing for mistakes
  • resonance analysis, sound analysis, sound evaluation, sound sample, sound testing
  • structure testing, ductility, nodularity
  • Eigenfrequency analysis, Eigenfrequency measurement, Eigenfrequency testing
  • for magnetic and nonmagnetic metals, ceramics, sintered products, glass
  • alternative or replacement for color penetration testing, eddy current testing, ultrasound, magnetic powder testing, X-ray testing


Dokumente zum Thema

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