Accession Number : AD0679545

Title :   METEOROLOGICAL CONDITIONS AFFECTING ARCTIC SOUND PROPAGATION,

Corporate Author : RAND CORP SANTA MONICA CALIF

Personal Author(s) : Batten,E. S. ; Schutz,C.

Report Date : NOV 1968

Pagination or Media Count : 38

Abstract : A description of the effects of vertical temperature distribution and wind on the propagation of sound in the lowest layers of the Arctic atmosphere. Variations in temperature profiles are examined seasonally, daily, and diurnally under various wind conditions, and the behavior of the wind within the friction layer of the atmosphere is explored. The theory of the Ekman spiral is used to compute the theoretical distribution of wind speed and sound speed as a function of azimuth for three characteristic temperature profiles as a function of azimuth. Considering temperature alone, the calculations show that supernormal audibility will probably be common during the polar night and perhaps during the summer twilight. (Author)

Descriptors :   (*METEOROLOGICAL PHENOMENA, *ARCTIC REGIONS), (*SOUND TRANSMISSION, ATMOSPHERES), WIND, ATMOSPHERIC TEMPERATURE, DETECTION, VELOCITY, DISTRIBUTION, AUDITORY PERCEPTION, FRICTION, TWILIGHT, THERMAL STABILITY, PERIODIC VARIATIONS, STATISTICAL ANALYSIS, DIURNAL VARIATIONS, POLAR REGIONS

Subject Categories : Meteorology
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE