Bottom Reflection Loss in an Area in the Hatteras Abyssal Plain

Bottom reflection loss measurements were made along three tracks in a 1 degree quadrangle, designated Area C, extending from 33 deg 00' to 34 deg 00'N and 71 deg 00' to 72 deg 00'W. The area lies along the northwestern edge of the Hatteras Abyssal Plain. Explosive sound sources w...

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Bibliographic Details
Main Author: Winokur, Robert S.
Other Authors: NAVAL OCEANOGRAPHIC OFFICE NSTL STATION MS
Format: Text
Language:English
Published: 1965
Subjects:
Acoustics
*ACOUSTIC REFLECTION
*BOTTOM LOSS
SOUND TRANSMISSION
ACOUSTIC MEASUREMENT
UNDERWATER EXPLOSIONS
NORTH ATLANTIC OCEAN
ABYSSAL ZONES
ACOUSTIC DATA
UNDERWATER SOUND
MOST Project-2
Hatteras Abyssal Plain
Quadrangle
North Atlantic
Online Access:http://www.dtic.mil/docs/citations/ADA071232
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA071232
Description
Summary:Bottom reflection loss measurements were made along three tracks in a 1 degree quadrangle, designated Area C, extending from 33 deg 00' to 34 deg 00'N and 71 deg 00' to 72 deg 00'W. The area lies along the northwestern edge of the Hatteras Abyssal Plain. Explosive sound sources were used and, based on peak pressure, bottom reflection loss values were computed. Bottom loss at 1 and 3.5 kc for grazing angles between 20 and 60 degrees are reported. The results indicate that the bottom is frequency selective, which is suggested by the frequency crossings or inverse relationship between bottom loss and frequency exhibited by the data along one track. A uniform dependence of bottom loss on grazing angle is not observed. (Author)

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