Accession Number:

AD0779876

Title:

Random Frequency Function Generation.

Descriptive Note:

Interim rept.,

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s):

Report Date:

1974-04-30

Pagination or Media Count:

20.0

Abstract:

The desired signature characteristics of the source generator for use on a long-range acoustic propagation experiment are defined. A programmable frequency function is proposed, consisting of slowly varying frequency undulations whose rate and magnitudes are pseudo-randomly distributed. The power spectral density and other significant properties of the frequency function are derived and displayed in both tabular and graphical form. A method is presented of implementing the random frequency function generator which uses a digital programmable read-only memory as its central element. The function generator is simple and reliable in concept and circuit, and should find application in a variety of underwater acoustic experiments. Author

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Acoustic Detection and Detectors
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE