Acoustic reflection from quasiperiodic sedimentary sequences

摘要: A useful theoretical measure of acoustic interaction with the seafloor is plane wave reflection coefficient (R), which commonly expressed as bottom loss (−20 log ‖R‖). Predictions indicate that when modeled a refracting layer over basement half‐space, proportional to frequency. Bottom measurements in 50–1600‐Hz band, however, frequently show inversely For example, roughly one‐third set measured data North Atlantic exhibit this anomalous frequency dependence. It concluded dependence due sedimentary fine‐scale layering arising from turbidity currents. The evidence presented consists (1) high correlation between stations and bounds abyssal plains (2) favorable predictions model accounting for data. study area was western including Sohm, ...