Accession Number : AD0330099

Title :   ACOUSTIC-RADIO INTERACTION

Corporate Author : GEORGIA INST OF TECH ATLANTA ENGINEERING EXPERIMENT STATION

Personal Author(s) : RIVERS, WAYNE K. JR.

Report Date : JUN 1962

Pagination or Media Count : 1

Abstract : The feasibility of detecting the acoustic field of a submarine by interaction with electromagnetic waves is discussed. The modulation on an electromagnetic wave which interacts with the surface of the sea produced by acoustic perturbation of the conductivity and dielectric constant of the sea water and by fluctuation in the surface height due to the acoustic wave is calculated for normally incident waves as a function of the radio and acoustic frequencies and the electromagnetic parameters of the sea water. The characteristics of the acoustic output of a typical submarine, the minimum detectable modulation index of available receivers and effects of wind-generated wave noise are introduced to evaluate the feasibility of a submarine detection system. It is concluded that acoustic perturbation of the conductivity and dielectric constant of salt water is too small to be useful, but that the Doppler modulation caused by movement of the water surface at the acoustic rate is large enough to appear promising for development as a detection mechanism. (Author)

Descriptors :   ACOUSTICS, ANTISUBMARINE WARFARE, DETECTION, ELECTROMAGNETIC PROPERTIES, ELECTROMAGNETIC RADIATION, FEASIBILITY STUDIES, MODULATION, OCEAN WAVES, RADIO WAVES, REFLECTION, SEA WATER, SOUND, SUBMARINE NOISE.

Subject Categories : Acoustic Detection and Detectors
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE