Accession Number : AD0695130
Title : AMBIENT NOISE AND SOUND TRANSMISSION IN TROPICAL WATERS.
Descriptive Note : Final rept. 16 Sep 56-15 Dec 61.
Corporate Author : MIAMI UNIV FLA MARINE LAB
Report Date : MAR 1962
Pagination or Media Count : 6
Abstract : Measurements of ambient noise were carried out in the Tongue of the Ocean during cruises of the R/V GERDA in 1958 and 1959. Data were obtained on the spectrum levels of ambient noise in relation to windspeed, sea state and water depth at various locations. In 1960 and 1961, exploratory studies of the contributions of surface waves to ambient noise were made at the Bimini Hydrophone Installation. In 1959, sound propagation tests in the Tongue of the Ocean employing a series of explosive charges, showed the existence of a surface channel and indicated the possibilities using such tests to determine its properties. Other work under contract included the measurement of noise radiated by the oceanographic vessel USNS GIBBS and the ultrasonic absorption of natural suspensions of calcium carbonate and other substances. (Author)
Descriptors : (*UNDERWATER SOUND, *SOUND TRANSMISSION), (*SOUND TRANSMISSION, BAHAMA ISLANDS), (*UNDERWATER SOUND, TROPICAL REGIONS), BAHAMA ISLANDS, OCEANOGRAPHIC SHIPS, HYDROPHONES, WIND, VELOCITY, DEEP WATER, TROPICAL REGIONS, ULTRASONIC PROPERTIES
Subject Categories : Acoustics
Distribution Statement : APPROVED FOR PUBLIC RELEASE