Accession Number : AD0434384

Title :   CHARACTERISTICS OF ACOUSTIC ATMOSPHERES,

Corporate Author : ARMY ELECTRONICS RESEARCH AND DEVELOPMENT ACTIVITY WHITE SANDS MISSILE RANGE N MEX

Personal Author(s) : Williamson,L. Edwin

Report Date : MAR 1964

Pagination or Media Count : 21

Abstract : Data from approximately three hundred meteorological rocket soundings are analyzed to study the seasonal and geographical variations in the general atmospheric acoustic structure. Geographical categories are defined as subtropical, midlatitude and subpolar, and meridional variations within these categories are briefly discussed. The winter and summer periods are de termined by the direction of flow in the upper stratosphere, between the spring and fall reversal periods. Tentative results show that the mean acoustic structure exhibits significant temporal and spatial variations. For certain features in the mean acoustic profile, sound speed variations in excess of 25 m/sec may exist in a seasonal transition. Similar differences may exist between the profiles representing subtropical and subpolar locations during a season. Height differences of these features may exceed a 3 km for either a seasonal or low-to-high latitude transition. (Author)

Descriptors :   (*ACOUSTICS, ATMOSPHERES), METEOROLOGICAL SATELLITES, SOUNDING ROCKETS, PERIODIC VARIATIONS, TEMPERATURE, WIND

Distribution Statement : APPROVED FOR PUBLIC RELEASE