Advanced Applications for Underwater Acoustic Modeling

Box 4

Summary of inverse ocean acoustic sensing techniques.

Propagation

(i) Matched field processing:

  (a) source localization,

  (b) marine environment characterization.

(ii) Ocean acoustic tomography:

  (a) density field (eddies, currents),

  (b) temperature (climate monitoring).

(iii) Deductive geoacoustic inversion:

  (a) sediment parameters,

  (b) sea-floor scattering characteristics.

(iv) Time reversal mirror (TRM):

  (a) signal refocusing.

Noise

(i) Field inversion:

  (a) wind speeds,

  (b) rainfall rates.

(ii) Acoustic daylight:

  (a) object imaging.

(iii) Geoacoustic inversion:

  (a) seabed acoustics.

Reverberation

(i) Field inversion:

  (a) sea-floor imaging.

(ii) TRM nulling:

  (a) reverberation attenuation.