Accession Number:

ADA071525

Title:

Evaluation of Word Intelligibility of Two Modulator/Demodulator Systems of a Spread Spectrum Communication System in Presence of Simulated Cockpit Noise.

Descriptive Note:

Technical rept.,

Corporate Author:

AEROSPACE MEDICAL RESEARCH LAB WRIGHT-PATTERSON AFB OH

Report Date:

1978-06-01

Pagination or Media Count:

14.0

Abstract:

The communication effectiveness of words processed through two modems of a spead spectrum radio system during various jamming conditions was measured in the presence of the simulated noise of an aircraft cockpit. Results indicate that the intelligibility of words processed through the two modems is differentially affected at various jammer-signal JS power ratios by the presence of the simulated F-15A cockpit noise. Word intelligibility decreased with corresponding increases in the JS power ratio, although the effect is not a simple one, i.e., it is not the same at all JS levels. It is also indicated that high levels of the simulated cockpit noise produce greater decrements in word intelligibility than low levels for all the JS power ratios evaluated. The importance of evaluating potential Air Force voice communication systems in as realistic an acoustical environment as practical is emphasized. Author

Subject Categories:

  • Psychology
  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE