geometric divergence. The study of attenuation of elastic waves in materials has increased in recent years, particularly within the study of polycrystalline materials where researchers aim to "nondestructively evaluate the degree of damage of engineering components" and to "develop improved procedures for characterizing microstructures".

Attenuation in viscoelastic materials

In viscoelastic materials, the attenuation coefficients per length for longitudinal waves and for transverse waves

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