Arctic Ambient Noise

Analysis was made of Arctic ambient noise data taken in a 1988 experiment. In 1988, the (Canadian) Defense Research Establishment Pacific carried out an Arctic ambient noise experiment. A 24-element vertical array was deployed as well as several individual sensors at various horizontal ranges from t...

Full description

Bibliographic Details
Main Author: Hodgkiss, William S.
Other Authors: SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA MARINE PHYSICAL LAB
Format: Text
Language:English
Published: 1991
Subjects:
Physical and Dynamic Oceanography
*AMBIENT NOISE
*ARCTIC REGIONS
DATA BASES
TRANSIENTS
DETECTORS
CRACKS
TIME SERIES ANALYSIS
ARRAYS
POWER SPECTRA
OCEANOGRAPHIC DATA
ICE
VERTICAL ORIENTATION
MILITARY RESEARCH
BROADBAND
BEAM FORMING
LEVEL(QUANTITY)
HYDROPHONES
PACIFIC OCEAN
ACOUSTIC DATA
PLOTTING
QUIET
NARROWBAND
DEEP OCEANS
*UNDERWATER NOISE
ARCTIC OCEAN
ACOUSTIC ARRAYS
VERTICAL ARRAYS
Arctic
Arctic Ocean
Pacific
Online Access:http://www.dtic.mil/docs/citations/ADA242001
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA242001
Description
Summary:Analysis was made of Arctic ambient noise data taken in a 1988 experiment. In 1988, the (Canadian) Defense Research Establishment Pacific carried out an Arctic ambient noise experiment. A 24-element vertical array was deployed as well as several individual sensors at various horizontal ranges from the vertical array. Selected segments of the data set were requested and obtained from DREP. These included quiet periods and active periods (various types of ice cracking events). A number of analyses were performed on the data including: (1) time series plots, (2) time-evolving power plots, (3) power spectra of the individual hydrophones, and (4) narrowband and broadband beamforming of the vertical array data. In general, it was found that the arctic ambient noise levels in this data set varied over a large range depending on the number of ice cracking events. These levels ranged from lower to higher than normally observed NE Pacific deep ocean data. The beamformed data was revealing in that it indicated the presence of a number of transient events that appear to be related to ice cracking activity.

Similar Items