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

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...

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Bibliographic Details
Main Author: Bunney,Robert E
Other Authors: WASHINGTON UNIV SEATTLE APPLIED PHYSICS LAB
Format: Text
Language:English
Published: 1974
Subjects:
Snow
Ice and Permafrost
Acoustic Detection and Detectors
Acoustics
*Permafrost
*Acoustic properties
Sounding
Sonar pulses
Low frequency
Sonar echoes
Acoustic velocity
Soils
Moisture
Acoustic attenuation
Ice
Interfaces
Acoustic reflection
Reflectivity
Computer programs
*Pulse echo technique
*Acoustic sounding
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA118513
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA118513
Description
Summary: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)

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