Accession Number : AD0737692

Title :   Underwater Sound Propagation in the Straits of Florida: The Preliminary Analysis of the MIMI Experiment of 1970.

Descriptive Note : Technical rept.,

Corporate Author : MICHIGAN UNIV ANN ARBOR COOLEY ELECTRONICS LAB

Personal Author(s) : Heitmeyer,Richard M.

Report Date : FEB 1972

Pagination or Media Count : 215

Abstract : An underwater acoustic propagation experiment was conducted during the month of November 1970 as part of the Project MIMI propagation and signal processing research program. A periodic broadband signal, modulating a 420 HZ carrier was transmitted continuously across the Straits of Florida for 19 days. At the receiving site, the power and phase angle of the carrier, the power in the signal sidebands, and the noise power in the signal band were measured. In addition, the total power and the power spectrum in a narrow band about the carrier line were determined as a measure of the modulation due to the forward-scattered surface reverberation. Finally, the correlation of the received signal with a stored reference was computed to measure the multipath structure and its stability. This report presents a brief description of the acoustical range, the experiment, and the preliminary analysis of the data. (Author)

Descriptors :   (*UNDERWATER SOUND, SOUND TRANSMISSION), (*SOUND TRANSMISSION, *FLORIDA STRAIT), BROADBAND, EXTREMELY LOW FREQUENCY, VELOCITY, REVERBERATION, SHALLOW WATER, UNDERWATER SOUND SIGNALS, POWER SPECTRA, PROCESSING

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE