Accession Number:

AD0691107

Title:

ACOUSTIC NOISE MEASUREMENTS UNDER FREE-FIELD CONDITIONS.

Descriptive Note:

Research and development technical rept.,

Corporate Author:

ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s):

Report Date:

1969-06-01

Pagination or Media Count:

24.0

Abstract:

There is an increasing requirement by the field forces for new power source systems which operate silently. A method is described for the determination of equipment acoustic noise by octave-band analysis under free-field conditions. A procedure based on critical band theory is discussed for the establishment of masked threshold criteria to evaluate equipment sound pressure levels SPL. Preferred octave-band spectra are given in terms of 20-foot sound pressure levels which correspond to the just audible noise for listeners at 50 and 100 feet for a jungle environment. Author

Subject Categories:

  • Electric Power Production and Distribution
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE