COMPUTATION OF ACOUSTIC RAYS FROM TEMPERATURES MEASURED IN THE DEEP OCEAN AND PREDICTION OF THE RANGE TO THE CONVERGENCE ZONE.
NAVAL RESEARCH LAB WASHINGTON D C
Pagination or Media Count:
When sound waves from a simple source are ejected into the ocean, the outward motion of the wavefronts is controlled by the speed of sound, which is a function of the depth. Temperature soundings by means of a 900-ft bathy thermograph and Nansen bottle casts were made to determine the sound speed c as a function of the depth z. Coordinate acoustic soundings to 1000-ft depths were made. Geometric ideas are developed for use in arithmetically calculating the predicted sound pressure. The basis of the calculations is the sound speed function cz determined at the place and time of the acoustic soundings. Computational methods are developed and used to obtain numerical values for horizontal ranges to the convergence zone. These values agree quite well with experimentally determined values. Author