A preliminary numerical model of three-dimensional underwater sound propagation in the Block Island Wind Farm area

2017 ◽  
Vol 141 (5) ◽  
pp. 3993-3993 ◽  
Author(s):  
Ying-Tsong Lin ◽  
Arthur Newhall ◽  
Gopu R. Potty ◽  
James H Miller
Keyword(s):  
Numerical Model ◽  
Wind Farm ◽  
Sound Propagation ◽  
Three Dimensional ◽  
Underwater Sound ◽  
Block Island

scholarly journals A three-dimensional underwater sound propagation model for offshore wind farm noise prediction

2019 ◽  
Vol 145 (5) ◽  
pp. EL335-EL340 ◽  
Author(s):  
Ying-Tsong Lin ◽  
Arthur E. Newhall ◽  
James H. Miller ◽  
Gopu R. Potty ◽  
Kathleen J. Vigness-Raposa
Keyword(s):  
Wind Farm ◽  
Sound Propagation ◽  
Three Dimensional ◽  
Propagation Model ◽  
Offshore Wind ◽  
Noise Prediction ◽  
Underwater Sound ◽  
Offshore Wind Farm

scholarly journals THREE-DIMENSIONAL SOUND PROPAGATION MODELS USING THE PARABOLIC-EQUATION APPROXIMATION AND THE SPLIT-STEP FOURIER METHOD

2013 ◽  
Vol 21 (01) ◽  
pp. 1250018 ◽  
Author(s):  
YING-TSONG LIN ◽  
TIMOTHY F. DUDA ◽  
ARTHUR E. NEWHALL
Keyword(s):  
Parabolic Equation ◽  
Sound Propagation ◽  
Azimuthal Angle ◽  
Three Dimensional ◽  
Fourier Method ◽  
Radial Coordinate ◽  
Underwater Sound ◽  
Propagation Models ◽  
Cylindrical Grid ◽  
Grid Points

The split-step Fourier method is used in three-dimensional parabolic-equation (PE) models to compute underwater sound propagation in one direction (i.e. forward). The method is implemented in both Cartesian (x, y, z) and cylindrical (r, θ, z) coordinate systems, with forward defined as along x and radial coordinate r, respectively. The Cartesian model has uniform resolution throughout the domain, and has errors that increase with azimuthal angle from the x axis. The cylindrical model has consistent validity in each azimuthal direction, but a fixed cylindrical grid of radials cannot produce uniform resolution. Two different methods to achieve more uniform resolution in the cylindrical PE model are presented. One of the methods is to increase the grid points in azimuth, as a function of r, according to nonaliased sampling theory. The other is to make use of a fixed arc-length grid. In addition, a point-source starter is derived for the three-dimensional Cartesian PE model. Results from idealized seamount and slope calculations are shown to compare and verify the performance of the three methods.

EXPERIMENTAL MEASUREMENTS OF THREE-DIMENSIONAL UNDERWATER SOUND PROPAGATION

2001 ◽  
Vol 09 (01) ◽  
pp. 125-132
Author(s):  
STEWART A. L. GLEGG ◽  
JOSEPH M. RILEY ◽  
JOSEPH CICHOCK
Keyword(s):  
Sound Propagation ◽  
Three Dimensional ◽  
Experimental Measurements ◽  
Underwater Sound

scholarly journals Characteristics of Three-Dimensional Sound Propagation in Western North Pacific Fronts

2021 ◽  
Vol 9 (9) ◽  
pp. 1035
Author(s):  
Jiaqi Liu ◽  
Shengchun Piao ◽  
Minghui Zhang ◽  
Shizhao Zhang ◽  
Junyuan Guo ◽  
...  
Keyword(s):  
North Pacific ◽  
Western North Pacific ◽  
Sound Propagation ◽  
Transmission Loss ◽  
Three Dimensional ◽  
Measurement Data ◽  
Sound Waves ◽  
Underwater Sound ◽  
Oceanic Front ◽  
The Impact

Oceanic fronts involved by ocean currents led to strong gradients of temperature, density and salinity, which have significant effects on underwater sound propagation. This paper focuses on the impact of the oceanic front on three-dimensional underwater sound propagation. A joint experiment of ocean acoustic and physical oceanography at the western North Pacific fronts is introduced. The measurement data for sound waves passed through the oceanic front is processed. The results are analysed and compared with the numerical simulation. It was found that transmission loss presented some difference when the source was located in the front centre and sound waves propagated towards water mass on opposite sides of the front centre. And when the sound field is excited by the underwater explosion at a depth of 200 m, the effects of the horizontal refraction cannot be neglected. On the other hand, the transmission loss for sound pressure fell sharply and rose rapidly at the side of cold water masses.

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