Modelling propagation of sound emitted by mini-airguns
conference paper
A modelling approach is described in which time-domain underwater-acoustic source functions are generated using a model that predicts the motion of air-bubbles generated by mini-airguns operated at various pressures. These time-series are Fourier-transformed to produce frequency-domain descriptions of the source. These are combined with complex transfer functions describing the propagation of sound in shallow-water waveguide geometries so that source spectra can be converted to received spectra by a simple multiplication process for specified source and receiver positions. Received spectra can be inverse-Fourier transformed to produce time-series of received signals. Calculations are performed to yield three acoustic variables: one pressure and two particle velocities (in the radial and vertical directions). Time-series are shown for a test environment in which total acoustic fields are made up of contributions from waterborne and bottom-interacting paths. © 2018 80th EAGE Conference and Exhibition 2018 Workshop Programme.
Topics
TNO Identifier
867830
ISBN
9789462822573
Publisher
European Association of Geoscientists and Engineers, EAGE
Source title
80th EAGE Conference and Exhibition 2018 Workshop Programme, 80th EAGE Conference and Exhibition 2018 Workshop Programme, 10 June 2018 through 15 July 2018
Collation
p.
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