Nonlinear Probing of Rocks and Soils

Abstract

Two nonlinear sonar systems, TAMU NLS nos. 1 and 2 have been designed and constructed. The first operates at a difference frequency of 24 kHz and uses a receiver that is a complete EDO Western 4034A sonar system in itself. With this nonlinear system one can probe a maximum distance of 257 feet (78 m) straight down in a salt mine. System no. 2 has a difference frequency of 6 kHz, for the reason of obtaining more range in the rock than System no. 1. The lower primary frequencies will be less attenuated in beam forming at the difference frequency. (edc)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1990
Accession Number
ADA223268

Entities

People

  • Robert R. Unterberger

Organizations

  • Texas A&M University

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Acoustic Arrays
  • Acoustic Propagation
  • Acoustic Waves
  • Acoustics
  • Detection
  • Detectors
  • Difference Frequency
  • Electrical Engineering
  • Frequency
  • Materials Science
  • Measurement
  • Military Research
  • Physics
  • Physics Laboratories
  • Reflection
  • Sound Waves
  • Transducers

Readers

  • Oceanography.
  • Phased Array Antenna Design.
  • Wave Propagation and Nonlinear Chaotic Dynamics.