2. Sectors concerned

Since vibrations by their very nature affect any object, vibratory techniques have been applied to mechanical sciences, civil engineering, transportation and so on. There is thus a diversity of approaches (one could say engineering cultures and technologies) aimed at controlling vibrations, possibly at generating them, more often at isolating them, or better still at reducing them at source, with a view to attenuating these vibrations as well as the noise and nuisance they generate.

Conversely, the application of vibrations to an object can also be used to characterize its elastic properties for testing and analysis, conformity control or even continuous monitoring of a transformation process.

The range of frequencies that can be analyzed is extremely broad:

• Extremely low frequencies (EBF)...