Global‐Scale Full‐Waveform Ambient Noise Inversion

Compressive geoacoustic inversion using ambient noise.

Surface generated ambient noise can be used to infer sediment properties. Here, a passive geoacoustic inversion method that uses noise recorded by a drifting vertical array is adopted. The array is steered using beamforming to compute the noise arriving at the array from various directions. This information is used in two different ways: Coherently (cross-correlation of upward/downward propagat...

Bayesian geoacoustic inversion using wind-driven ambient noise.

This paper applies Bayesian inversion to bottom-loss data derived from wind-driven ambient noise measurements from a vertical line array to quantify the information content constraining seabed geoacoustic parameters. The inversion utilizes a previously proposed ray-based representation of the ambient noise field as a forward model for fast computations of bottom loss data for a layered seabed. ...

Trans-dimensional geoacoustic inversion of wind-driven ambient noise.

This letter applies trans-dimensional Bayesian geoacoustic inversion to quantify the uncertainty due to model selection when inverting bottom-loss data derived from wind-driven ambient-noise measurements. A partition model is used to represent the seabed, in which the number of layers, their thicknesses, and acoustic parameters are unknowns to be determined from the data. Exploration of the par...

Bayesian Ambient Noise Inversion for Geoacoustic Uncertainty Estimation: Final report

Sediment Acoustics: Wideband Model, Reflection Loss and Ambient Noise Inversion

(1) Consolidation of the new BIC08 model: The Biot-Stoll grain contact squirt flow and shear viscous drag (BICSQS) model, which includes squirt flow at the grain-grain contacts (Chotiros, Isakson 2004), combined with improvements in squirt flow modeling, the frame virtual mass extension to account for the random grains rotation (Chotiros, Isakson 2007), and the high-frequency viscous drag corre...