Long Term Statistical Measurements of Environmental Acoustics Parameters in the Arctic. AEAS Report Number 2. Low Frequency Transmission Loss Measurements in the Central Arctic Ocean.

• Main Author: Buck,B M
• Other Authors: POLAR RESEARCH LAB INC CARPINTERIA CA
• Format: Text
• Language: English
• Published: 1985
• Subjects: Physical and Dynamic Oceanography; Acoustics; *ACOUSTIC MEASUREMENT; *LOW FREQUENCY; *TRANSMISSION LOSS; *ARCTIC OCEAN; SOURCES; ENVIRONMENTS; AIRCRAFT; PARAMETERS; WATER; ENERGY; STATISTICS; PATHS; SIGNALS; YIELD; LEVEL(QUANTITY); MEAN; HYDROPHONES; AMBIENT NOISE; UNDERWATER ACOUSTICS; ABYSSAL ZONES; ROUGHNESS; DEEP WATER; TNT; UNDERWATER; ARCTIC REGIONS; BUOYS; LATITUDE; DEEP DEPTH; LOW FREQUENCIES; Arctic; Arctic Ocean
• Online Access: http://www.dtic.mil/docs/citations/ADA156576; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA156576

Propagation loss data were taken using manned ice camps and aircraft and ambient noise levels were measured using arctic data buoys that operated through the NIMBUS 6 and NOAA series satellites. The present report of the series addresses propagation loss in deep water (i.e., over 1000 m) of the Central Arctic Ocean at low frequencies (10 - 500 Hz). The data were taken primaily for underwater shots, although some CW data are included, at source depths between 18.3 m and 243.8 m. Receiving hydrophones were at depths between 18.3 m and 243.8 m. Receiving hydrophones were at depths between 9 and 91 m. Other data in the tabulations include for the source: station name, type, depth below sea level and below the ice, nominal TNT yield, measured yield, latitude and longitude, water depth, and source energy at the analysis frequencies. For the receiver: station name, hydrophone depth below sea level and below the ice, nominal TNT yield, measured yield, latitude and longitude, water depth, and source energy at the analysis frequencies. For the receiver: station name, hydrophone depth below sea level and below the ice, latitude and longitude, water depth, and received signal energy at the analysis frequencies. For the path: range, bottomside ice roughness, % of path less than 1000 m deep, % of path over an abyssal plain, mean path depth, and minimum depth in the path. Keywords: Central Arctic Ocean; Transmission loss; Low frequency; Underwater acoustics; Shots; Deep water; Hydrophone.