Accession Number : AD0260928

Title :   MICRO-METEOROLOGICAL MEASUREMENTS BY MEANS OF SOUND

Corporate Author : SMYTH RESEARCH ASSOCIATES SAN DIEGO CALIF

Personal Author(s) : GIBBS,J.H.

Report Date : 31 JUL 1960

Pagination or Media Count : 1

Abstract : This study deals with the investigation of the scale and spectra of the turbulent fluctuations over an extended range in the lower atmosphere by means of sound propagation measurements. The measurements were carried out using singleengine, low-flying jet aircraft as the source of sound and the reception at the ground was accomplished by acoustical transducers in horns which were pointed vertically. The analysis of the data was performed by studying several discrete frequencies in the range from 500 to 2000 cycles per sec. It is concluded that sound propagation measurements are a feasible means of evaluating atmospheric turbulence characteristics. (Author)

Descriptors :   *ACOUSTIC DETECTORS, *MICROMETEOROLOGY, *SOUND TRANSMISSION, ACOUSTIC HORNS, ATMOSPHERES, JET ENGINE NOISE, JET AIRCRAFT, MEASUREMENT, PROPAGATION, SOUND, TEST METHODS, TURBULENCE

Distribution Statement : APPROVED FOR PUBLIC RELEASE