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Showing 1 to 5 of 5 for “"sound channel"”.

  1. Geographic Variations of Sound Channel Axis in the Global Ocean

    Acharya, Mukunda Kumar2020

    Sound signals are used for imaging and communication in the ocean. Underwater sound speed has a minimum at a certain depth that forms a sound channel for long-range underwater sound propagation. The geographic variation of sound channel is crucial in uses of underwater sound in various environments …

    mississippi Repository record

  2. SOFAR signal shaping : influence of topography and relative source depth

    Krige, LeonDepartment of Oceanography2000

    … depth of the source relative to the axis of the sound channel is investigated. Eight shot signals from five different sites near Cape Town were received at three widely spaced hydrophones at Ascension over a number of 4.4 Megametre lines. These signals show the effects of (1) sources at different …

    cape-town Repository record

  3. THE EFFECT OF TROPICAL CYCLONE PASSAGE ON UNDERSEA ACOUSTIC PARAMETERS IN THE EAST CHINA SEA

    Depompeo, Jasmine S.Monterey, CA; Naval Postgraduate School2024

    … sonic layer depth, below layer gradient, deep sound channel axis, deep sound channel strength, and critical depth. Results show that all acoustic parameters, with the exception of below layer gradient, experience a response to tropical cyclone passage that is correlated with storm intensity. …

    nps Repository record

  4. Acoustic mode coherence in the Arctic Ocean

    Polcari, John J.Massachusetts Institute of Technology and Woods Hole Oceanographic Institution1986

    The dual issues of modal decomposition for tonal sound fields and the temporal coherence of the modal amplitudes are investigated for the case of the central Arctic sound channel at very low frequencies (15-80 Hz). A detailed study of the Arctic modal structure for these frequencies reveals the …

    woods-hole Repository record

  5. Stochastic acoustic ray tracing with dynamically orthogonal equations

    Humara, Michael JesusMassachusetts Institute of Technology and Woods Hole Oceanographic Institution2020

    … to three idealized cases of stochastic sound-speed profiles (SSPs): constant-gradients, uncertain deep-sound channel, and a varied sonic layer depth. Through this implementation with non-Gaussian examples, we observe the ability to represent the stochastic ray trace field in a reduced …

    woods-hole Repository record