Underwater acoustic beam dynamics

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Ray- and mode-based theoretical predictions of the spreads of directionally narrow beams are presented and compared to parabolic-equation-based simulations in deep-ocean environments. Both the spatial and temporal spreads of beams are considered. The environments considered consist of a range-independent deep-ocean background sound channel on which a highly structured sound-speed perturbation, associated with either internal waves or homogeneous isotropic single-scale turbulence, is superimposed. The simulation results are shown to be in good agreement with simple theoretical expressions which predict that beam spreading, in both the unperturbed and perturbed environments, is largely controlled by a property of the background sound channel-the ray-based stability parameter α or the asymptotically equivalent mode-based waveguide invariant Β. These results are consistent with earlier results showing that wavefield structure and stability are largely controlled by α (or Β).

Original languageEnglish (US)
Pages (from-to)80-91
Number of pages12
JournalJournal of the Acoustical Society of America
Volume126
Issue number1
DOIs
StatePublished - 2009

Fingerprint

underwater acoustics
acoustics
rays
oceans
internal waves
simulation
turbulence
waveguides
perturbation
predictions
Sound
Underwater
Acoustics
Simulation
Controlled
Ocean

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Underwater acoustic beam dynamics. / Beron-Vera, Francisco J; Brown, Michael G.

In: Journal of the Acoustical Society of America, Vol. 126, No. 1, 2009, p. 80-91.

Research output: Contribution to journalArticle

@article{e35437a6b459423f9cdbe36a9fdbd00e,
title = "Underwater acoustic beam dynamics",
abstract = "Ray- and mode-based theoretical predictions of the spreads of directionally narrow beams are presented and compared to parabolic-equation-based simulations in deep-ocean environments. Both the spatial and temporal spreads of beams are considered. The environments considered consist of a range-independent deep-ocean background sound channel on which a highly structured sound-speed perturbation, associated with either internal waves or homogeneous isotropic single-scale turbulence, is superimposed. The simulation results are shown to be in good agreement with simple theoretical expressions which predict that beam spreading, in both the unperturbed and perturbed environments, is largely controlled by a property of the background sound channel-the ray-based stability parameter α or the asymptotically equivalent mode-based waveguide invariant Β. These results are consistent with earlier results showing that wavefield structure and stability are largely controlled by α (or Β).",
author = "Beron-Vera, {Francisco J} and Brown, {Michael G}",
year = "2009",
doi = "10.1121/1.3139901",
language = "English (US)",
volume = "126",
pages = "80--91",
journal = "Journal of the Acoustical Society of America",
issn = "0001-4966",
publisher = "Acoustical Society of America",
number = "1",

}

TY - JOUR

T1 - Underwater acoustic beam dynamics

AU - Beron-Vera, Francisco J

AU - Brown, Michael G

PY - 2009

Y1 - 2009

N2 - Ray- and mode-based theoretical predictions of the spreads of directionally narrow beams are presented and compared to parabolic-equation-based simulations in deep-ocean environments. Both the spatial and temporal spreads of beams are considered. The environments considered consist of a range-independent deep-ocean background sound channel on which a highly structured sound-speed perturbation, associated with either internal waves or homogeneous isotropic single-scale turbulence, is superimposed. The simulation results are shown to be in good agreement with simple theoretical expressions which predict that beam spreading, in both the unperturbed and perturbed environments, is largely controlled by a property of the background sound channel-the ray-based stability parameter α or the asymptotically equivalent mode-based waveguide invariant Β. These results are consistent with earlier results showing that wavefield structure and stability are largely controlled by α (or Β).

AB - Ray- and mode-based theoretical predictions of the spreads of directionally narrow beams are presented and compared to parabolic-equation-based simulations in deep-ocean environments. Both the spatial and temporal spreads of beams are considered. The environments considered consist of a range-independent deep-ocean background sound channel on which a highly structured sound-speed perturbation, associated with either internal waves or homogeneous isotropic single-scale turbulence, is superimposed. The simulation results are shown to be in good agreement with simple theoretical expressions which predict that beam spreading, in both the unperturbed and perturbed environments, is largely controlled by a property of the background sound channel-the ray-based stability parameter α or the asymptotically equivalent mode-based waveguide invariant Β. These results are consistent with earlier results showing that wavefield structure and stability are largely controlled by α (or Β).

UR - http://www.scopus.com/inward/record.url?scp=68149139291&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=68149139291&partnerID=8YFLogxK

U2 - 10.1121/1.3139901

DO - 10.1121/1.3139901

M3 - Article

C2 - 19603864

AN - SCOPUS:68149139291

VL - 126

SP - 80

EP - 91

JO - Journal of the Acoustical Society of America

JF - Journal of the Acoustical Society of America

SN - 0001-4966

IS - 1

ER -