A New Computerized Single Frequency Seafloor Classification System

Abstract

The sediment classification capabilities of a new computerized acoustic system has been field tested and evaluated. The sediment classifier is an echo strength measuring device which quantitatively and qualitatively measures the acoustic signal returning from various reflectors at the surface and within the sea floor. It accomplishes this by measuring the echo return amplitude and pulse character in ten adjustable width time windows which correspond to depth increments in the sediment. Through a microprocessor, the system is then able to apply algorithms based on multilayer acoustic theory to compute acoustic impedance for each of the depth increments in the sediment. This profile of sediment acoustic impedance is then used in conjunction with other algorithms to predict sediment structure and type and various geotechnical properties such as attenuation, density, porosity, sound velocity, and grain size. Reprints.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1988
Accession Number
ADA198071

Entities

People

  • D. N. Lambert

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Acoustic Impedance
  • Acoustic Properties
  • Computers
  • Data Analysis
  • Data Storage Systems
  • Databases
  • Grain Size
  • High Resolution
  • Impedance
  • Laboratory Procedures
  • Macroprogramming
  • Materials
  • Measurement
  • Operating Systems
  • Seabed
  • Signal Processing
  • Statistical Analysis

Readers

  • Electrical Engineering
  • Neural Network Machine Learning.
  • Oceanography.