Sound Propagation Experiments Conducted under the Polar Ice Pack during the Summer of 1958

During the summer of 1958 the U. S. Navy Underwater Sound Laboratory made sound propagation measurements in the Arctic Ocean. The group velocity of the shots over an average range of 790 kyds appears to change with time, being highest in early and late summer and lowest in midsummer. The spectrum en...

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Bibliographic Details
Main Author: Hecht, Richard J
Other Authors: NAVY UNDERWATER SOUND LAB NEW LONDON CT
Format: Text
Language:English
Published: 1960
Subjects:
Physical and Dynamic Oceanography
*ARCTIC OCEAN
*UNDERWATER SOUND
POWER SPECTRA
SEA ICE
SOUND TRANSMISSION
VELOCITY
MOST PROJECT-2
Arctic
Arctic Ocean
ice pack
Sea ice
Online Access:http://www.dtic.mil/docs/citations/AD0758081
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0758081
Description
Summary:During the summer of 1958 the U. S. Navy Underwater Sound Laboratory made sound propagation measurements in the Arctic Ocean. The group velocity of the shots over an average range of 790 kyds appears to change with time, being highest in early and late summer and lowest in midsummer. The spectrum energy curves for various-sized charges show an average slope of -17 to -24db per octave above cps. It is probable that the pack ice acting as a band rejection filter accounts for the presence of only low frequencies. The transmission loss over a range of 790 kyds averaged 103.5 db.

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