ACOUSTIC ATTENUATION IN SEA ICE.

A study is underway of the acoustic attenuation properties of sea ice. The transmitting transducer was driven by a sinusoidal signal whose frequency was swept mechanically over the frequency range 10 to 500 kHz. The suitably amplified signal from the receiving transducer was plotted against frequenc...

Full description

Bibliographic Details
Main Authors: Langleben,M. P., Pounder,E. R.
Other Authors: MCGILL UNIV MONTREAL (QUEBEC) MACDONALD PHYSICS LAB
Format: Text
Language:English
Published: 1968
Subjects:
Snow
Ice and Permafrost
Acoustics
(*SEA ICE
MECHANICAL WAVES)
(*MECHANICAL WAVES
ATTENUATION)
SEA WATER
SIMULATION
RESONANT FREQUENCY
PROPAGATION
TRANSDUCERS
ARCTIC REGIONS
CANADA
Arctic
Canada
Ice
permafrost
Sea ice
Online Access:http://www.dtic.mil/docs/citations/AD0679627
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0679627
Description
Summary:A study is underway of the acoustic attenuation properties of sea ice. The transmitting transducer was driven by a sinusoidal signal whose frequency was swept mechanically over the frequency range 10 to 500 kHz. The suitably amplified signal from the receiving transducer was plotted against frequency on an X-Y recorder. No absolute power measurements were attempted, but the transmission path was reduced by stages and the resulting differences in received power compared. In a second series of laboratory experiments, small transducers were frozen at various positions through the ice sample to permit in situ power measurements. Results of laboratory and field measurements agree quite well on the pattern of attenuation with frequency, although the numerical values differ somewhat between different samples of ice. (Author)

Similar Items