Attenuation and Loss Models
The Acoustics Module includes several different physics interfaces and various features that introduce acoustic losses. These describe everything from thermoviscous boundary layer losses to the attenuation experienced when acoustic waves propagate over long distances in the ocean. The models have different applicability depending on the frequency regime and the system modeled.
This section first gives a short description of the different loss mechanism, then the applicability and the regime where boundary layer and bulk losses apply is discussed, and finally some remarks are given on the bulk viscosity and how it is related to attenuation.
In this section:
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Loss Mechanisms
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The Atmosphere and Ocean Attenuation Models
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Boundary Layer vs. Bulk Losses