Ambient noise depth-dependence models and their relation to low-frequency attenuation

摘要: Both a deterministic dipole model and the law of conjugate depths are applied to study depth dependence low‐frequency ambient noise in main sound channel and, when used together, reasonable agreement with experiment is obtained. Scattering or diffusion models for region below critical agree well experiment. Complete area line source level derived. Three approximate predictions attenuation come from deep dependence, differences site position, depth, respectively. All three consistent conventional measurements scattering bottom loss mechanism.