Abstract
Recent in situ measurements of shear and compressional wave attenuation in sediments provide an appropriate data set to develop empirical relationships among seafloor acoustic and physical properties. Compressional wave attenuation increases with increasing mean grain size and bulk density and with decreasing porosity, whereas the relationships among shear wave attenuation and these physical properties display the opposite trends. The ratio of shear to compressional attenuation ranges from 25 to 60, with the highest values occurring in fine‐grained, high‐porosity sediments. Empirical relationships defined by regressions of compressional and shear wave speeds on sediment physical properties have high confidence levels. However, confidence levels for the prediction of attenuation are poor due to a combination of measurement technique, spatial variability, and presence of strong near‐surface gradients.
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