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Acoustic Attenuation Summary

Measure of the energy loss of sound propagation in media; phenomenon when hearing protectors help reduce acoustic flux from flowing into the ears, is measured in decibels (dBs)

Acoustic attenuation

Acoustic attenuation is a measure of the energy loss of sound propagation in media. Most media have viscosity, and are therefore not ideal media. When sound propagates in such media, there is always thermal consumption of energy caused by viscosity. For inhomogeneous media, besides media viscosity, acoustic scattering is another main reason for removal of acoustic energy. Acoustic attenuation in a lossy medium plays an important role in many scientific researches and engineering fields, such as medical ultrasonography, vibration and noise reduction.

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