Utilization of a Transmitting Array Matched to Individual Modes.

Abstract

A vertical transmitting array was implanted in Block Island Sound in November 1970. A theoretical study was undertaken to determine the optimum utilization of such an array to excite individual normal modes. The results of this study are described. Two basic methods to emphasize individual modes, amplitude and phase matching, are outlined. The bases of these methods are derived from the basic properties of modes. Sample cases using these approaches were run using a computer program. The physical characteristics of the implanted array and BIFI velocity profiles typical for summer and winter were assumed. Propagation loss was calculated for individual modes when the array was matched in turn to modes 1-4. For each profile and mode, three methods of emphasizing individual modes, two amplitude matching and one phase matching method, were evaluated. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 28, 1973
Accession Number
ADA033135

Entities

People

  • William G. Kanabis

Organizations

  • Naval Undersea Warfare Center

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Acoustic Properties
  • Amplitude
  • Block Island
  • Block Island Sound
  • Computer Programs
  • Computers
  • Dual Mode
  • Frequency
  • Islands
  • Plane Waves
  • Shallow Water
  • Transmitting
  • Water
  • Waves

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Control Systems Engineering.
  • Systems Analysis and Design