A Modified Prony Method Approach to Echo-Reduction Measurements of Time- Limited Transient Signals

Abstract

A modified Prony method is presented for measuring the steady-state echo reduction of acoustic panels. The method extrapolates the steady-state amplitudes from the transient portion of the signal allowing time-limited measurements. The method is applied to measurements of square panels 76 cm on an edge and 0.95 cm-thick steel and aluminum in the frequency range of 3 - 10 kHz. The signals were time-limited to 200 microseconds (0.6 - 2.0 wavelengths) by the arrival of the diffracted signal from the panel edges. Results are compared with theoretical values and a program listing is included.

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Document Details

Document Type
Technical Report
Publication Date
Jun 16, 1980
Accession Number
ADA087211

Entities

People

  • David H. Trivett

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Algorithms
  • Aluminum
  • Amplitude
  • Application Software
  • Coefficients
  • Computations
  • Curve Fitting
  • Difference Equations
  • Differential Equations
  • Equations
  • Frequency
  • Linear Differential Equations
  • Measurement
  • Military Research
  • Steady State
  • Underwater Sound

Fields of Study

  • Physics

Readers

  • Approximation Theory.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering