Accession Number : ADA118513

Title :   Feasibility of Determining Subsurface Permafrost Structure Using Acoustic Pulse Echo Techniques.

Descriptive Note : Final rept.,

Corporate Author : WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB

Personal Author(s) : Bunney,Robert E

PDF Url : ADA118513

Report Date : Apr 1974

Pagination or Media Count : 83

Abstract : The results of controlled laboratory experiments on the acoustic properties of representative samples of permafrost are reported and the data compared with theoretical predictions. Measurements of velocity, attenuation and reflectivity were performed and evaluated with respect to the feasibility of using pulse echo techniques to analyze near (50 ft) subsurface permafrost structure. Although acoustic pulse echo techniques appear feasible, further laboratory experiments, as well as field tests, to measure the acoustic properties of permafrost in situ, are recommended. (Author)

Descriptors :   *Permafrost, *Acoustic properties, Sounding, Sonar pulses, Low frequency, Sonar echoes, Acoustic velocity, Soils, Moisture, Acoustic attenuation, Ice, Interfaces, Acoustic reflection, Reflectivity, Computer programs

Subject Categories : Snow, Ice and Permafrost
      Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE