A METHOD FOR THE PREDICTION OF THE FARFIELD FROM NEARFIELD MEASUREMENTS OF THE AMPLITUDE ALONE.

Abstract

A method is presented for the prediction of the farfield from nearfield measurements of only the amplitude of a sound source. The method is based on a finite series expansion of the auto-power in the field. A numerical evaluation is given for a small theoretical source distribution under incoherent, partially coherent, and coherent conditions and it is shown that good results can be obtained if enough nearfield measurements are made. (Author)

Document Details

Document Type
Technical Report
Publication Date
May 01, 1969
Accession Number
AD0687130

Entities

People

  • John L. Butler

Tags

DTIC Thesaurus Topics

  • Amplitude
  • Intensity
  • Mathematical Analysis
  • Mathematics
  • Measurement
  • Sequences
  • Test And Evaluation

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering