Accession Number:

ADA037309

Title:

A Survey of Background Noise from Acoustic Frequencies to Optic Frequencies

Descriptive Note:

Interim rept.

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

Report Date:

1976-12-01

Pagination or Media Count:

142.0

Abstract:

This report presents a summary of background noise characteristics considered useful for the analysis and specification of performances of receiver systems. The frequency range of interest covers the region from acoustic frequencies to optic frequencies. Extensive data of measured noise characteristics are provided. These measured data show 1. The acoustic noise in the deep ocean is largely determined by the sea state condition, 2. The radio frequency RF background noise between the ELF and HF bands is dominated by radiations from terrestrial lightenings, and 3. From VHF through optic frequencies galectic radiations and atmospheric absorption noises are the major sources of background noise.

Subject Categories:

  • Acoustics
  • Optics
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE